What is the difference between flat washers and lock washers?

Flat washers are ideal for increasing surface area and distributing the applied force when tightening a fastener. They can be used on the fastener's bolt & nut sides, or used as spacers when using a bolt may not be appropriate. Lock washers produce tension during tightening to control the loosening of nuts. They are commonly used on the fastener's nut side for applications involving vibrations.

How to install a flat washer?

Place the flat washer between the threaded fastener (like a nut) and the screw / bolt head. Make sure that the washer presses against the fastener & other adjacent surfaces to form a tight connection. Press the fastener down to lock the grooves of a serrated washer with the grooves of the nut. Use a wrench or ratchet to tighten the nut / threaded fastener. Ensure that the teeth of a serrated washer are covered completely by the nut / fastener head, or that a split washer is slightly out of alignment. This indicates tension on the threaded fastener. Users may loosen the nut / threaded fastener to adjust the washer if it is not operating correctly.

How to remove a flat washer?

Simply remove the nut / threaded fastener that is holding the washer in place using a vice-grip or pipe wrench.Use a flat screwdriver to pry a lock washer off. When removing a split washer, the screwdriver head should be placed inside the split or beneath the washer and pushed. When removing a washer having teeth, the screwdriver head should be placed under a tooth and pushed up, repeating the procedure with more teeth if required. For other flat washer types, the screwdriver head can be placed below the washer and pushed up. The washer may break during removal, depending on the amount of pressure being applied.If the flat washer does not budge, use penetrating oil and repeat the previous step.Some flat washers can be used multiple times easily. Other washers (split lock) can be used only 1 or 2 times. Users should not reuse a split flat washer or other damaged washers. Do not use old washers in high-stress joint applications.

Flat Washers

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SUPER-STRUT -

AB241 Series Square Washer

Style	Model	Color	Finish	Material	Thickness	Width
A	AB241L-1/2EG	-	Electro-Galvanized	Steel	1/2"	1-9/16"	RFQ
B	AB241L-5/8EG	-	Electro-Galvanized	Steel	-	-	RFQ
B	AB241L-1/2	-	Gold Galvanized	Steel	1/2"	1-9/16"	RFQ
B	AB241L-1/4	-	Gold Galvanized	Steel	-	1-9/16"	RFQ
B	AB241L-1/4EG	-	Silver Galvanized	Steel	-	-	RFQ
B	AB241L-3/8	-	Gold Galvanized	Steel	3/8"	1-9/16"	RFQ
A	AB241L-3/8EG	-	Electro-Galvanized	Steel	3/8"	1-9/16"	RFQ
C	AB241L-5/16	-	Gold Galvanized	Steel	-	-	RFQ
B	AB241L-5/16EG	-	Electro-Galvanized	Steel	-	-	RFQ
B	AB241L-5/8	-	Gold Galvanized	Steel	-	-	RFQ
D	AB241-1/2-HDG	-	Hot-Dip Galvanized	Steel	1/4"	1-1/2"	RFQ
D	AB241-3/4	-	Gold Galvanized	Steel	1/4"	1-1/2"	RFQ
D	AB241-3/8-HDG	-	Hot-Dip Galvanized	Steel	3/16"	1-1/2"	RFQ
E	AB241-5/16	-	Gold Galvanized	Steel	1/8"	1-1/2"	RFQ
F	AB241-5/16GR	-	-	Steel	1/8"	-	RFQ
F	AB241-5/16SS	-	-	Stainless Steel	1/8"	-	RFQ
E	AB241-5/8	-	Gold Galvanized	Steel	1/8"	1-1/2"	RFQ
F	AB241-5/8SS316	-	-	Stainless Steel	1/4"	-	RFQ
E	AB241-1/2-GR	Green	-	Steel	1/4"	1-1/2"	RFQ
E	AB241-3/8-GR	Green	Urethane Powder	Steel	3/16"	1-1/2"	RFQ
E	AB241-3/8-WH	White	Urethane Powder	Steel	3/16"	1-1/2"	RFQ
E	AB241-1/2-WH	White	-	Steel	1/4"	1-1/2"	RFQ

FABORY -

Flat Washers

Style	Model	Fastener Finish	Finish	Fits Bolt Sizes	System of Measurement	Thickness	Washer Inside Dia.	Washer Material Grade	Washer O.D.	Price (inc. GST)
A	B38157.087.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	7/8"	Inch	0.165"	15/16"	Low Carbon	2 1/4"	A$ 313.48
B	B38157.031.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	5/16"	Inch	0.083"	3/8"	Low Carbon	7/8"	A$ 897.51
C	B38157.150.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 1/2	Inch	0.18"	1 5/8"	Low Carbon	3 1/2"	A$ 301.00
D	B38157.137.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 3/8	Inch	0.18"	1 1/2"	Low Carbon	3 1/4"	A$ 724.97
E	B38157.125.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 1/4	Inch	0.165"	1 3/8"	Low Carbon	3"	A$ 508.88
F	B38157.112.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 1/8	Inch	0.165"	1 1/4"	Low Carbon	2 3/4"	A$ 911.06
G	U38157.137.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 3/8	Inch	0.18"	1 1/2"	-	3 1/4"	A$ 17.60
H	U38157.056.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	9/16"	Inch	0.109"	5/8"	-	1 15/32"	A$ 12.18
I	B38157.100.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1"	Inch	0.165"	1 1/16"	Low Carbon	2 1/2"	A$ 260.95
J	B38157.025.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1/4"	Inch	0.065"	5/16"	Low Carbon	47/64"	A$ 605.81
K	B38157.075.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	3/4"	Inch	0.148"	13/16"	Low Carbon	2"	A$ 745.42
L	B38157.062.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	5/8"	Inch	0.134"	11/16"	Low Carbon	1 3/4"	A$ 527.49
M	B38157.056.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	9/16"	Inch	0.109"	5/8"	Low Carbon	1 15/32"	A$ 812.33
N	B38157.050.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1/2"	Inch	0.109"	9/16"	Low Carbon	1 3/8"	A$ 261.69
O	B38157.043.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	7/16"	Inch	0.083"	1/2"	Low Carbon	1 1/4"	A$ 1113.71
P	B38157.037.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	3/8"	Inch	0.083"	7/16"	Low Carbon	1"	A$ 303.44
Q	B55420.043.0001	Plain	Plain	7/16"	Inch	0.083"	1/2"	316	1 1/4"	A$ 1019.15
R	B55420.031.0001	Plain	Plain	5/16"	Inch	0.083"	3/8"	316	7/8"	A$ 1100.68
S	B55420.037.0001	Plain	Plain	3/8"	Inch	0.083"	7/16"	316	1"	A$ 995.02
T	B55410.100.0002	Plain	Plain	1"	Inch	0.141"	1 1/16"	316	2 1/2"	A$ 808.62
U	B55420.025.0001	Plain	Plain	1/4"	Inch	0.065"	5/16"	316	47/64"	A$ 1006.76
V	B55410.050.0002	Plain	Plain	1/2"	Inch	0.063"	9/16"	316	1 1/4"	A$ 1511.62
W	B55410.037.0001	Plain	Plain	3/8"	Inch	0.047"	3/8"	316	7/8"	A$ 592.59
X	B55410.037.0002	Plain	Plain	3/8"	Inch	0.047"	13/32"	316	13/16"	-	RFQ
Y	B55410.037.0003	Plain	Plain	3/8"	Inch	0.063"	7/16"	316	1"	A$ 792.00

ACCURATE MANUFACTURED PRODUCTS GROUP -

Flat Washers

ACCURATE MANUFACTURED PRODUCTS GROUP WAS407M5

Style	Model	Fits Bolt Sizes	System of Measurement	Thickness	Thickness Tolerance	Washer Inside Dia.	Washer O.D.	Price (inc. GST)
A	WAS407#10	#10	Inch	0.046875"	+/-0.015"	7/32"	1/2"	A$ 18.77
A	WAS40712	1/2"	Inch	0.0625"	+/-0.015"	17/32"	1 1/16"	A$ 30.98
A	WAS40714	1/4"	Inch	0.0625"	+/-0.015"	9/32"	5/8"	A$ 26.85
A	WAS40738	3/8"	Inch	0.0625"	+/-0.015"	13/32"	13/16"	A$ 19.40
A	WAS40751	5/16"	Inch	0.0625"	+/-0.015"	11/32"	11/16"	A$ 18.77
B	WAS407M5	M5	Metric	1 mm	+/-0.10mm	5.3 mm	10 mm	A$ 23.46	RFQ
B	WAS407M6	M6	Metric	1.6 mm	+/-0.20mm	6.4 mm	12 mm	A$ 29.57	RFQ
B	WAS407M8	M8	Metric	1.6 mm	+/-0.20mm	8.4 mm	16 mm	A$ 32.29	RFQ
A	WAS407M10	M10	Metric	2 mm	+/-0.20mm	10.5 mm	20 mm	A$ 33.58
B	WAS407M12	M12	Metric	2.5 mm	+/-0.20mm	13.0 mm	24 mm	A$ 44.64	RFQ

TE-CO -

Washer Assemblies

Style	Model	Color	Fits Bolt Sizes	Inside Dia.	Material	Outside Dia.	Rockwell Hardness	Size	Thickness	Price (inc. GST)
A	42702	Black	5/16, 3/8"	13/32"	Steel	7/8"	85 to 90 on 15N Scale	-	1/4"	A$ 5.38
B	42703	Black	7/16, 1/2"	17/32"	Steel	1.125"	85 to 90 on 15N Scale	-	5/16	A$ 8.19
C	42704	Black	5/8"	21/32"	Steel	1.375"	85 to 90 on 15N Scale	5/8"	5/16	A$ 10.31
D	42705	Black	3/4"	25/32"	Steel	1.625"	85 to 90 on 15N Scale	3/4"	3/8"	A$ 13.67
E	42706	Black	7/8"	15/16"	Steel	1.75"	85 to 90 on 15N Scale	7/8"	3/8"	A$ 18.28
F	42707	Black	1"	1-1/16"	Steel	2"	85 to 90 on 15N Scale	1"	1/2"	A$ 19.61
G	42708	Black	1.125"	1.200"	Steel	2.25"	85 to 90 on 15N Scale	1 1/8"	1/2"	A$ 36.47
H	42710	Black	1.5"	1.500"	Steel	2.875"	85 to 90 on 15N Scale	1 1/2 Lbs.	1/2"	A$ 63.28
I	47702	Plain	3/8"	13/32"	303 Stainless Steel	7/8"	27 on 15N Scale	3/8"	1/4"	A$ 23.62
J	47705	Plain	3/4"	25/32"	303 Stainless Steel	1.625"	27 on 15N Scale	3/4"	3/8"	A$ 48.65

TE-CO -

Flat Washers, Black Oxide

Style	Model	Fits Bolt Sizes	Inside Dia.	Item	Material	Outside Dia.	Size	Thickness	Price (inc. GST)
A	42612	#4	1/8"	Flat Washer	Steel	5/16"	-	5/64	A$ 0.11
B	42614	#8	3/16"	Flat Washer	Steel	7/16"	-	5/64	A$ 0.04
C	42600	#10	13/64"	Flat Washer	Steel	1/2"	-	3/32"	-	RFQ
D	42609	1"	1"	Flat Washer	Steel	2"	1"	3/16"	A$ 26.37
E	42627	1"	1.030"	Heavy Duty Washer	Hardened Steel	2"	1"	9/32"	-	RFQ
F	42611	1.25"	1.300"	Flat Washer	Steel	2.5"	1 1/4 Lbs.	9/32"	-	RFQ
G	42610	1.125"	1"	Flat Washer	Steel	2.25"	1 1/8"	7/32"	-	RFQ
H	42605	1/2"	17/32"	Flat Washer	Steel	1.125"	1/2"	1/8"	A$ 25.41
I	42619	1/4"	9/32"	Heavy Duty Washer	Hardened Steel	5/8"	1/4"	3/16"	A$ 0.22
J	42607	3/4"	25/32"	Flat Washer	Steel	1.625"	3/4"	5/32	A$ 2.52
K	42621	3/8"	13/32"	Heavy Duty Washer	Hardened Steel	7/8"	3/8"	3/16"	-	RFQ
L	42620	5/16"	11/32"	Heavy Duty Washer	Hardened Steel	3/4"	5/16"	3/16"	A$ 25.14
M	42626	7/8"	29/32"	Heavy Duty Washer	Hardened Steel	1.75"	7/8"	1/4"	-	RFQ
N	42604	7/16"	15/32"	Flat Washer	Steel	1"	7/16"	1/8"	A$ 0.20

DYNAFORM -

Nylon Flat Washers

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Size	Thickness	Price (inc. GST)
A	874340	1/2"	1/2"	3/4"	1/2"	0.058"	A$ 4.34
B	874350	3/4"	3/4"	1"	3/4"	0.063"	A$ 4.62

FABORY -

Plain Washers

Style	Model	Fastener Finish	Finish	Fits Bolt Sizes	Thickness	Washer Inside Dia.	Washer Material Grade	Washer O.D.	Price (inc. GST)
A	L55420.070.0001	Plain	Plain	M7	1.6 mm	7.4 mm	A4	14 mm	A$ 1273.10
A	L51532.120.0001	Plain	Plain	M12	6 mm	13.0 mm	A2	30 mm	A$ 709.61
A	L51532.100.0001	Plain	Plain	M10	4 mm	10.5 mm	A2	25 mm	A$ 1060.97
A	L51532.080.0001	Plain	Plain	M8	4 mm	8.4 mm	A2	21 mm	-	RFQ
A	L51532.060.0001	Plain	Plain	M6	3 mm	6.4 mm	A2	17 mm	A$ 943.95
A	L38250.020.0001	Zinc Plated	Zinc Plated	M2	0.3 mm	2.2 mm	Low Carbon	4 1/2 mm	A$ 3063.98
A	L38430.120.0001	Zinc Plated	Zinc Plated	M12	6 mm	13.0 mm	Low Carbon	30 mm	A$ 1398.52
A	L38250.030.0001	Zinc Plated	Zinc Plated	M3	0.5 mm	3.2 mm	Low Carbon	6 mm	A$ 2800.53
A	L38430.300.0001	Zinc Plated	Zinc Plated	M30	1 mm	31.0 mm	Low Carbon	68 mm	A$ 602.62
A	L38430.270.0001	Zinc Plated	Zinc Plated	M27	1 mm	28.0 mm	Low Carbon	60 mm	A$ 1401.53
A	L38430.240.0001	Zinc Plated	Zinc Plated	M24	1 mm	25.0 mm	Low Carbon	50 mm	A$ 1614.43
A	L38430.220.0001	Zinc Plated	Zinc Plated	M22	8 mm	23.0 mm	Low Carbon	50 mm	A$ 2185.88
A	L38430.160.0001	Zinc Plated	Zinc Plated	M16	6 mm	17.0 mm	Low Carbon	40 mm	A$ 523.16
A	L38430.100.0001	Zinc Plated	Zinc Plated	M10	4 mm	10.5 mm	Low Carbon	25 mm	A$ 811.67
A	L38250.040.0001	Zinc Plated	Zinc Plated	M4	0.5 mm	4.3 mm	Low Carbon	8 mm	A$ 1261.06
A	L38430.080.0001	Zinc Plated	Zinc Plated	M8	4 mm	8.4 mm	Low Carbon	21 mm	A$ 1438.21
A	L38430.060.0001	Zinc Plated	Zinc Plated	M6	3 mm	6.4 mm	Low Carbon	17 mm	A$ 1710.85
A	L38430.050.0001	Zinc Plated	Zinc Plated	M5	2 mm	5.3 mm	Low Carbon	15 mm	A$ 1705.29
A	L38430.040.0001	Zinc Plated	Zinc Plated	M4	1.6 mm	4.3 mm	Low Carbon	12 mm	A$ 2111.27
A	L38430.030.0001	Zinc Plated	Zinc Plated	M3	1 mm	3.2 mm	Low Carbon	9 mm	A$ 1291.16
A	L38250.200.0001	Zinc Plated	Zinc Plated	M20	3 mm	21.0 mm	Low Carbon	34 mm	A$ 562.72
A	L38250.180.0001	Zinc Plated	Zinc Plated	M18	2.5 mm	19.0 mm	Low Carbon	30 mm	A$ 2422.09
A	L38250.160.0001	Zinc Plated	Zinc Plated	M16	2.5 mm	17.0 mm	Low Carbon	28 mm	A$ 621.15
A	L38250.140.0001	Zinc Plated	Zinc Plated	M14	2.5 mm	15.0 mm	Low Carbon	24 mm	A$ 1162.70
A	L38250.120.0001	Zinc Plated	Zinc Plated	M12	2 mm	13.0 mm	Low Carbon	20 mm	A$ 1354.34

FABORY -

SAE Washers

Style	Model	Fits Bolt Sizes	Thickness	Washer Inside Dia.	Washer O.D.	Price (inc. GST)
A	B38206.150.0001	1 1/2	0.165"	1 5/8"	3"	A$ 369.01
A	U38206.150.0001	1 1/2	0.165"	1 5/8"	3"	A$ 16.11
A	U38206.125.0001	1 1/4	0.165"	1 3/8"	2 1/2"	A$ 12.32
A	B38206.125.0001	1 1/4	0.165"	1 3/8"	2 1/2"	A$ 443.65
A	U38206.112.0001	1 1/8	0.134"	1 1/4"	2 1/4"	A$ 8.60
A	B38206.112.0001	1 1/8	0.134"	1 1/4"	2 1/4"	A$ 477.69
A	B38206.137.0001	1 3/8	0.165"	1 1/2"	2 3/4"	A$ 405.20
A	U38206.137.0001	1 3/8	0.165"	1 1/2"	2 3/4"	A$ 11.67
A	U38206.100.0001	1"	0.134"	1 1/16"	2"	A$ 6.24
A	B38206.100.0001	1"	0.134"	1 1/16"	2"	A$ 426.86
A	B38206.050.0001	1/2"	0.095"	17/32"	1 1/16"	A$ 390.00
A	U38206.050.0001	1/2"	0.095"	17/32"	1 1/16"	A$ 14.67
A	B38206.025.0001	1/4"	0.065"	9/32"	5/8"	A$ 560.16
A	U38206.025.0001	1/4"	0.065"	9/32"	5/8"	A$ 7.57
A	U38206.075.0001	3/4"	0.134"	13/16"	1 15/32"	A$ 11.87
A	B38206.075.0001	3/4"	0.134"	13/16"	1 15/32"	A$ 439.58
A	U38206.037.0001	3/8"	0.065"	13/32"	13/16"	A$ 12.12
A	B38206.037.0001	3/8"	0.065"	13/32"	13/16"	A$ 495.00
A	U38206.062.0001	5/8"	0.095"	21/32"	1 5/16"	A$ 12.03
A	B38206.062.0001	5/8"	0.095"	21/32"	1 5/16"	A$ 450.79
A	B38206.031.0001	5/16"	0.065"	11/32"	11/16"	A$ 504.31
A	U38206.031.0001	5/16"	0.065"	11/32"	11/16"	A$ 9.43
A	B38206.087.0001	7/8"	0.134"	15/16"	1 3/4"	A$ 415.14
A	U38206.087.0001	7/8"	0.134"	15/16"	1 3/4"	A$ 9.58
A	U38206.043.0001	7/16"	0.065"	15/32"	59/64"	A$ 6.82

FABORY -

Fender Washers

Style	Model	Fastener Finish	Finish	Fits Bolt Sizes	Thickness	Thickness Tolerance	Washer Inside Dia.	Washer Material Grade	Washer O.D.	Price (inc. GST)
A	U55530.018.0075	Plain	Plain	3/16"	0.065"	0.047" to 0.080"	3/16"	316	3/4"	A$ 15.00
B	B51530.031.0250	Plain	Plain	5/16"	0.065"	0.047" to 0.080"	5/16"	18-8	2 1/2"	A$ 1126.71
B	B51530.031.0087	Plain	Plain	5/16"	0.065"	0.047" to 0.080"	11/32"	18-8	7/8"	A$ 808.63
B	B51530.031.0100	Plain	Plain	5/16"	0.065"	0.047" to 0.080"	11/32"	18-8	1"	A$ 953.44
C	B51530.031.0125	Plain	Plain	5/16"	0.065"	0.047" to 0.080"	11/32"	18-8	1 1/4"	A$ 831.85
C	B51530.031.0150	Plain	Plain	5/16"	0.065"	0.047" to 0.080"	11/32"	18-8	1 1/2"	A$ 1195.74
B	B51530.031.0162	Plain	Plain	5/16"	0.065"	0.047" to 0.080"	11/32"	18-8	1 5/8"	A$ 920.04
B	B51530.031.0175	Plain	Plain	5/16"	0.065"	0.047" to 0.080"	5/16"	18-8	-	A$ 789.89
D	B51530.031.0200	Plain	Plain	5/16"	0.065"	0.047" to 0.080"	11/32"	18-8	2"	A$ 865.00
B	B51530.031.0300	Plain	Plain	5/16"	0.065"	0.047" to 0.080"	5/16"	18-8	3"	A$ 975.08
B	B51530.025.0250	Plain	Plain	1/4"	0.065"	0.047" to 0.080"	9/32"	18-8	2 1/2"	A$ 879.98
C	B51530.037.0125	Plain	Plain	3/8"	0.065"	0.047" to 0.080"	13/32"	18-8	1 1/4"	A$ 830.06
D	B51530.037.0150	Plain	Plain	3/8"	0.065"	0.047" to 0.080"	13/32"	18-8	1 1/2"	A$ 936.83
D	B51530.037.0162	Plain	Plain	3/8"	0.065"	0.047" to 0.080"	13/32"	18-8	1 5/8"	A$ 781.62
B	B51530.037.0175	Plain	Plain	3/8"	0.065"	0.047" to 0.080"	3/8"	18-8	1 3/4"	A$ 1602.26
C	B51530.037.0200	Plain	Plain	3/8"	0.065"	0.047" to 0.080"	13/32"	18-8	2"	A$ 713.41
B	B51530.037.0300	Plain	Plain	3/8"	0.065"	0.047" to 0.080"	3/8"	18-8	3"	A$ 919.86
B	B51530.050.0125	Plain	Plain	1/2"	0.065"	0.047" to 0.080"	1/2"	18-8	1 1/4"	A$ 1058.53
B	B51530.025.0300	Plain	Plain	1/4"	0.065"	0.047" to 0.080"	9/32"	18-8	3"	A$ 881.45
C	B51530.025.0200	Plain	Plain	1/4"	0.065"	0.047" to 0.080"	9/32"	18-8	2"	A$ 612.60
B	B51530.050.0175	Plain	Plain	1/2"	0.065"	0.047" to 0.080"	1/2"	18-8	1 3/4"	A$ 1918.91
E	B51530.012.0075	Plain	Plain	1/8"	0.065"	0.047" to 0.080"	5/32"	18-8	3/4"	A$ 969.50
B	B38213.037.0162	Plain	Plain	3/8"	0.0625"	+0.08" /-0.047"	13/32"	Low Carbon	1 5/8"	A$ 1043.61
B	B38213.037.0200	Plain	Plain	3/8"	0.0625"	+0.08" /-0.047"	13/32"	Low Carbon	2"	A$ 855.58
B	B38213.037.0300	Plain	Plain	3/8"	0.0625"	+0.08" /-0.047"	13/32"	Low Carbon	3"	A$ 505.74

FABORY -

USS Washers

Style	Model	Fastener Finish	Finish	Fits Bolt Sizes	Thickness	Washer Inside Dia.	Washer Material Grade	Washer O.D.	Price (inc. GST)
A	U55420.075.0001	Plain	Plain	3/4"	0.148"	13/16"	316	2"	A$ 91.77
A	B55420.075.0001	Plain	Plain	3/4"	0.140625"	13/16"	316	2"	A$ 1240.49
A	B38131.031.0001	Zinc Yellow	Zinc Yellow	5/16"	0.083"	3/8"	Through Hardened	7/8"	A$ 335.55
A	U38131.050.0001	Zinc Yellow	Zinc Yellow	1/2"	0.109"	9/16"	Through Hardened	1 3/8"	A$ 23.06
A	B38131.037.0001	Zinc Yellow	Zinc Yellow	3/8"	0.083"	7/16"	Through Hardened	1"	A$ 417.67
A	B38131.025.0001	Zinc Yellow	Zinc Yellow	1/4"	0.065"	5/16"	Through Hardened	47/64"	A$ 602.93
A	U38131.150.0001	Zinc Yellow	Zinc Yellow	1 1/2	0.18"	1 5/8"	Through Hardened	3 1/2"	A$ 21.80
A	U38131.137.0001	Zinc Yellow	Zinc Yellow	1 3/8	0.18"	1 1/2"	Through Hardened	3 1/4"	A$ 19.83
A	U38131.125.0001	Zinc Yellow	Zinc Yellow	1 1/4	0.165"	1 3/8"	Through Hardened	3"	A$ 15.02
A	U38131.112.0001	Zinc Yellow	Zinc Yellow	1 1/8	0.165"	1 1/4"	Through Hardened	2 3/4"	A$ 14.35
A	U38131.100.0001	Zinc Yellow	Zinc Yellow	1"	0.165"	1 1/16"	Through Hardened	2 1/2"	A$ 15.35
A	U38131.087.0001	Zinc Yellow	Zinc Yellow	7/8"	0.165"	15/16"	Through Hardened	2 1/4"	A$ 15.02
A	U38131.075.0001	Zinc Yellow	Zinc Yellow	3/4"	0.148"	13/16"	Through Hardened	2"	A$ 26.01
A	U38131.056.0001	Zinc Yellow	Zinc Yellow	9/16"	0.109"	5/8"	Through Hardened	1 15/32"	A$ 11.38
A	U38131.037.0001	Zinc Yellow	Zinc Yellow	3/8"	0.083"	7/16"	Through Hardened	1"	A$ 19.03
A	U38131.043.0001	Zinc Yellow	Zinc Yellow	7/16"	0.083"	1/2"	Through Hardened	1 1/4"	A$ 16.92
A	B38131.043.0001	Zinc Yellow	Zinc Yellow	7/16"	0.083"	1/2"	Through Hardened	1 1/4"	A$ 443.56
A	U38131.031.0001	Zinc Yellow	Zinc Yellow	5/16"	0.083"	3/8"	Through Hardened	7/8"	A$ 16.37
A	U38131.025.0001	Zinc Yellow	Zinc Yellow	1/4"	0.065"	5/16"	Through Hardened	47/64"	A$ 12.26
A	B38131.150.0001	Zinc Yellow	Zinc Yellow	1 1/2	0.18"	1 5/8"	Through Hardened	3 1/2"	A$ 375.14
A	B38131.137.0001	Zinc Yellow	Zinc Yellow	1 3/8	0.18"	1 1/2"	Through Hardened	3 1/4"	A$ 356.93
A	B38131.125.0001	Zinc Yellow	Zinc Yellow	1 1/4	0.165"	1 3/8"	Through Hardened	3"	A$ 376.60
A	B38131.112.0001	Zinc Yellow	Zinc Yellow	1 1/8	0.165"	1 1/4"	Through Hardened	2 3/4"	A$ 377.96
A	B38131.100.0001	Zinc Yellow	Zinc Yellow	1"	0.165"	1 1/16"	Through Hardened	2 1/2"	A$ 427.04
A	B38131.087.0001	Zinc Yellow	Zinc Yellow	7/8"	0.165"	15/16"	Through Hardened	2 1/4"	A$ 430.85

FABORY -

Flat Steel Washers

Style	Model	Fastener Finish	Finish	Fits Bolt Sizes	Thickness	Washer Inside Dia.	Washer O.D.	Price (inc. GST)
A	B04237.062.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	5/8"	0.122" to 0.177"	5/8"	1 5/16"	A$ 426.56
A	B04237.050.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1/2"	0.097" to 0.177"	1/2"	1 1/16"	A$ 453.05
A	B04237.075.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	3/4"	0.122" to 0.177"	3/4"	1 15/32"	A$ 496.34
A	B04237.087.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	7/8"	0.136" to 0.177"	7/8"	1 3/4"	A$ 415.25
A	B04237.100.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1"	0.136" to 0.177"	1"	2"	A$ 388.30
A	B04237.112.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 1/8	0.136" to 0.177"	1 1/8"	2 1/4"	A$ 448.29
A	B04237.125.0001	Hot Dipped Galvanized	Hot Dipped Galvanized	1 1/4	0.136" to 0.177"	1 1/4"	2 1/2"	A$ 447.94
A	B04035.050.0001	Plain	Plain	1/2"	0.097" to 0.177"	1/2"	1 1/16"	A$ 446.16
A	B04035.075.0001	Plain	Plain	3/4"	0.122" to 0.177"	3/4"	1 15/32"	A$ 423.50
A	B04035.100.0001	Plain	Plain	1"	0.136" to 0.177"	1"	2"	-	RFQ
A	B04035.062.0001	Plain	Plain	5/8"	0.122" to 0.177"	5/8"	1 5/16"	-	RFQ
A	B04035.087.0001	Plain	Plain	7/8"	0.136" to 0.177"	7/8"	1 3/4"	A$ 352.31
A	B04035.112.0001	Plain	Plain	1 1/8	0.136" to 0.177"	1 1/8"	2 1/4"	A$ 381.35
A	B04035.125.0001	Plain	Plain	1 1/4	0.136" to 0.177"	1 1/4"	2 1/2"	A$ 381.70

UNISTRUT -

Flat Washer

Style	Model	Size	Price (inc. GST)
A	HFLW050-EG	1/2"	-	RFQ
A	HFLW025-EG	1/4"	-	RFQ
B	HFLW075-EG	3/4"	-	RFQ
A	HFLW037-EG	3/8"	A$ 2.88	RFQ
B	HFLW062-EG	5/8"	-	RFQ
A	HFLW031-EG	5/16"	-	RFQ

SUPER-STRUT -

ZE147 Series Flat Washer

Style	Model	Finish	Inside Dia.	Thickness
A	ZE147-1/4EG	Electro-Galvanized	5/16"	0.08"	RFQ
A	ZE147-3/8EG	Gold Galvanized	3/8"	0.104"	RFQ

SUPER-STRUT -

EF147 Series Flat Washer

Style	Model	Finish	Inside Dia.	Material	Outside Dia.	Thickness
A	EF147-1/4SS316	-	5/16"	Stainless Steel	1 1/4"	-	RFQ
A	EF147-1/2SS316	-	17/32"	Stainless Steel	2"	0.051"	RFQ
A	EF147-3/8ATT	-	-	-	-	-	RFQ
A	EF147-3/8EG	Electro-Galvanized	-	Steel	1 1/2"	-	RFQ
A	EF147-1/4EG	Electro-Galvanized	-	Steel	1 1/4"	-	RFQ
A	EF147-1/2EG	Electro-Galvanized	-	Steel	2"	-	RFQ
A	EF147-3/8	Gold Galvanized	13/32"	Steel	1 1/2"	0.08"	RFQ
A	EF147-1/4	Gold Galvanized	5/16"	Steel	1 1/4"	-	RFQ
A	EF147-1/2	Gold Galvanized	-	Steel	2"	-	RFQ

SUPER-STRUT -

E147 Series Flat Washer

Style	Model	Color	Finish	Inside Dia.	Material	Outside Dia.	Thickness	Price (inc. GST)
A	E147-3/8SS	-	-	0.438"	Stainless Steel	1"	0.104"	-	RFQ
A	E147-3/8SS6	-	-	0.438"	Stainless Steel	1"	0.104"	-	RFQ
A	E147-1/4SS6	-	-	1/4"	Stainless Steel	-	-	-	RFQ
A	E147-1/2SS6	-	-	1/2"	Stainless Steel	-	-	-	RFQ
B	E147-1/4	-	Gold Galvanized	-	Steel	-	-	-	RFQ
A	E147-1/2-SS	-	-	0.562"	Stainless Steel	1.375"	0.132"	-	RFQ
B	E147-1/2	-	Gold Galvanized	0.562"	Steel	1.375"	0.132"	-	RFQ
C	E147 3/8	Gold	Gold Galvanized	-	Steel	-	1/4"	A$ 90.31
A	E147-5/8EG	Silver	Electro-Galvanized	0.688"	Steel	1.75"	0.16"	-	RFQ
A	E147-5/16SS6	Silver	-	0.375"	Stainless Steel	0.875"	0.104"	-	RFQ
A	E147-1/4SS	Silver	-	0.312"	Stainless Steel	0.734"	0.8"	-	RFQ
B	E147-7/8	Silver	Electro-Galvanized	0.938"	Steel	2.25"	0.192"	-	RFQ
B	E147-5/8	Silver	Electro-Galvanized	0.688"	Steel	1.75"	0.16"	-	RFQ
B	E147-5/16	Silver	Electro-Galvanized	0.375"	Steel	0.875"	0.104"	-	RFQ
B	E147-3/4	Silver	Electro-Galvanized	0.812"	Steel	2"	0.177"	-	RFQ

SUPER-STRUT -

C781 Series Square Washer

Style	Model	Finish	Material	Width
A	C781-5/8SS6	-	Stainless Steel	3"	RFQ
A	C-781-1/2-SS	-	Stainless Steel	3"	RFQ
A	C781-3/4B	Black	Steel	-	RFQ
A	C781-1/2B	Black	Steel	-	RFQ
A	C781-3/8B	Black	Steel	-	RFQ
A	C781-1B	Black	Steel	4"	RFQ
A	C781-5/8EG	Electro-Galvanized	Steel	3"	RFQ
A	C781-3/8EG	Electro-Galvanized	Steel	-	RFQ
A	C781-1/2-EG	Electro-Galvanized	Steel	-	RFQ

ARMOR COAT -

Flat Washers

Style	Model	Fits Bolt Sizes	Inside Dia.	Item	Outside Dia.	Size	Thickness	Type	Price (inc. GST)
A	UST237823	1/2"	9/16"	USS Washer	1.375"	1/2"	1/8"	USS	A$ 18.42
B	UST236043	1/2"	17/32"	SAE Washer	1 1/16"	1/2"	7/64"	SAE	A$ 9.27
C	UST237819	1/4"	5/16"	USS Washer	3/4"	1/4"	5/64"	USS	A$ 22.43
D	UST236039	1/4"	9/32"	SAE Washer	5/8"	1/4"	5/64"	SAE	A$ 15.86
E	UST237825	3/4"	13/16"	USS Washer	2"	3/4"	5/32"	USS	A$ 35.77
F	UST236045	3/4"	13/16"	SAE Washer	1 15/32"	3/4"	9/64"	SAE	A$ 11.56
G	UST237821	3/8"	7/16"	USS Washer	1"	3/8"	3/32"	USS	A$ 15.00
H	UST236041	3/8"	13/32"	SAE Washer	13/16"	3/8"	3/32"	SAE	A$ 11.24
I	UST237824	5/8"	21/32"	USS Washer	1.75"	5/8"	5/32"	USS	A$ 30.15
J	UST236044	5/8"	11/16"	SAE Washer	1 5/16"	5/8"	1/8"	SAE	A$ 14.59
K	UST237820	5/16"	3/8"	USS Washer	7/8"	5/16"	3/32"	USS	A$ 12.07
L	UST236040	5/16"	11/32"	SAE Washer	11/16"	5/16"	3/32"	SAE	A$ 7.69
M	UST237822	7/16"	1/2"	USS Washer	1.25"	7/16"	3/32"	USS	A$ 12.71
N	UST236042	7/16"	15/32"	SAE Washer	59/64"	7/16"	3/32"	SAE	A$ 7.14

APPROVED VENDOR -

Flat Washer Thick Stainless Steel

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Price (inc. GST)
A	U51410.006.0001	#0	1/16"	1/8"	0.016"	A$ 42.42
B	U51410.007.0001	#1	3/32"	5/32"	0.016"	A$ 38.19
C	U51410.008.0001	#2	3/32"	3/16"	0.031"	A$ 37.49
D	U51410.011.0001	#4	1/8"	1/4"	0.063"	A$ 135.52
E	U51410.011.0003	#4	1/8"	5/16"	0.078"	A$ 77.64
F	U51410.013.0002	#6	5/32"	5/16"	0.063"	A$ 65.35
G	U51410.013.0004	#6	5/32"	3/8"	0.078"	A$ 67.53
H	U51410.016.0003	#8	3/16"	7/16"	0.078"	A$ 53.46
I	U51410.016.0001	#8	5/32"	3/8"	0.063"	A$ 25.50
J	U51410.019.0001	#10	3/16"	1/2"	0.094"	A$ 8.06
K	U51410.100.0001	1"	1.031"	2"	0.188"	A$ 18.97
L	U51410.050.0003	1/2"	17/32"	1.125"	0.125"	A$ 19.65
M	U51410.025.0003	1/4"	9/32"	5/8"	0.125"	A$ 10.31
N	U51410.025.0001	1/4"	9/32"	1/2"	0.078"	A$ 89.76
O	U51410.075.0003	3/4"	25/32"	1.625"	0.125"	A$ 31.54
P	U51410.037.0004	3/8"	13/32"	7/8"	0.125"	A$ 23.23
Q	U51410.037.0002	3/8"	13/32"	3/4"	0.094"	A$ 11.24
R	U51410.062.0003	5/8"	61/93"	1.375"	0.125"	A$ 27.36
S	U51410.031.0003	5/16"	11/32"	11/16"	0.094"	A$ 356.18
T	U51410.031.0001	5/16"	11/32"	5/8"	0.094"	A$ 9.13
U	U51410.031.0005	5/16"	11/32"	3/4"	0.094"	A$ 11.50
V	U51410.031.0006	5/16"	11/32"	3/4"	0.125"	A$ 13.57
W	U51410.043.0003	7/16"	15/32"	1"	0.125"	A$ 23.66

APPROVED VENDOR -

Flat Washer Wide Stainless Steel

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Price (inc. GST)
A	U51420.100.0001	1"	1-1/16"	2.5"	0.165"	A$ 20.92
B	U51420.150.0001	1.5"	1.625"	3.5"	0.18"	A$ 38.74
C	U51420.125.0001	1.25"	1.375"	3"	0.165"	A$ 178.39
D	U51420.112.0001	1.125"	1.25"	2.75"	0.165"	A$ 17.60
E	U51420.056.0001	9/16"	5/8"	1 15/32"	0.109"	A$ 23.23

APPROVED VENDOR -

Flat Washer, Stainless Steel

Style	Model	Fits Bolt Sizes	Inside Dia.	Outside Dia.	Thickness	Price (inc. GST)
A	U51410.100.0005	1"	1-1/16"	2.5"	0.141"	A$ 185.29
B	U51410.075.0007	3/4"	25/32"	2"	0.125"	A$ 48.52
C	U51410.087.0003	7/8"	15/16"	2"	0.094"	A$ 8.25
D	U51410.087.0004	7/8"	15/16"	2"	0.109"	A$ 8.82
E	U51410.087.0005	7/8"	15/16"	2.25"	0.141"	A$ 43.75

BURNDY -

Durium Series Flat Washer

Style	Model	Bolt Size	Inside Dia.
A	50FWBOX	1-1/16"	1/2"	RFQ
B	25FWBOX	1/4"	1/4"	RFQ
A	38FWBOX	3/8"	0.421"	A$ 2.34	RFQ

12...6 7

Flat Washers

Flat washers are used with threaded fasteners for distributing the load uniformly and reducing frictional losses during screw tightening. These units are used for providing spacing and electrical insulation in control boxes. Raptor Supplies offers a wide array of flat washers from Accurate Mfd Products, Apollo, Armor Coat, C. Sherman Johnson, Dynaform, Earnest, Fabory, Foreverbolt, Grainger, Master Products, Metric Blue, TE-CO and Micro Plastics.

Features

Flat washers are designed to decrease friction, stop leakage, prevent loosening and reduce the distribution of pressure.
They enhance the size of a screw's bearing surface and decrease the surface pressure applied to the fastened object.
These washers secure surfaces by evenly distributing torque when a bolt or screw is tightened.
They eliminate corrosion between a steel screw and an aluminium surface.

Categories

Brands

Flat Washers

AB241 Series Square Washer

Flat Washers

Flat Washers

Washer Assemblies

Flat Washers, Black Oxide

Nylon Flat Washers

Plain Washers

SAE Washers

Fender Washers

USS Washers

Flat Steel Washers

Flat Washer

ZE147 Series Flat Washer

EF147 Series Flat Washer

E147 Series Flat Washer

C781 Series Square Washer

Flat Washers

Flat Washer Thick Stainless Steel

Flat Washer Wide Stainless Steel

Flat Washer, Stainless Steel

Durium Series Flat Washer

Flat Washers

Features

Frequently Asked Questions

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