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Split Lock Washer

Low carbon split lock washers are used under bolt heads or nuts to increase the hold of the fastener or to increase the bearing surface. Split lock washers are helical-shaped split rings. When fastened, the two ends exert a spring force on the fastener to create increased friction and resistance to motion. Dimensional specifications are governed by ASME B18.21.1.

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Governing Standards
Dimensional Specifications

Dimensional Specifications

Dimensional SpecificationsSplit Lock Washer

Per ASME B18.21.1-2009
Size	Nominal	A		B	T	W	BW
		Inside Diameter		Outside Diameter	Mean Section Thickness	Section Width	Bearing Width
		Max	Min	Max	Min	Min	Min
#2	0.0860	0.0940	0.0880	0.1720	0.0200	0.0350	0.0240
#3	0.0990	0.1070	0.1010	0.1950	0.0250	0.0400	0.0280
#4	0.1120	0.1200	0.1140	0.2090	0.0250	0.0400	0.0280
#5	0.1250	0.1330	0.1270	0.2360	0.0310	0.0470	0.0330
#6	0.1380	0.1480	0.1410	0.2500	0.0310	0.0470	0.0330
#8	0.1640	0.1740	0.1670	0.2930	0.0400	0.0550	0.0380
#10	0.1900	0.2000	0.1930	0.3340	0.0470	0.0620	0.0430
#12	0.2160	0.2270	0.2200	0.3770	0.0560	0.0700	0.0490
1/4	0.2500	0.2600	0.2520	0.4870	0.0620	0.1090	0.0760
5/16	0.3125	0.3220	0.3140	0.5830	0.0780	0.1250	0.0870
3/8	0.3750	0.3850	0.3770	0.6800	0.0940	0.1410	0.0990
7/16	0.4375	0.4500	0.4400	0.7760	0.1090	0.1560	0.1090
1/2	0.5000	0.5120	0.5020	0.8690	0.1250	0.1710	0.1200
9/16	0.5625	0.5740	0.5640	0.9650	0.1410	0.1880	0.1320
5/8	0.6250	0.6410	0.6280	1.0730	0.1560	0.2090	0.1420
3/4	0.7500	0.7660	0.7530	1.2650	0.1880	0.2340	0.1640
7/8	0.8750	0.8940	0.8780	1.4590	0.2190	0.2660	0.1860
1	1.0000	1.0240	1.0030	1.6560	0.2500	0.2970	0.2080
1 1/8	1.1250	1.1530	1.1290	1.8470	0.2810	0.3280	0.2300
1 1/4	1.2500	1.2800	1.2540	2.0360	0.3120	0.3590	0.2510
1 3/8	1.3750	1.4080	1.3790	2.2190	0.3440	0.3910	0.2740
1 1/2	1.5000	1.5340	1.5040	2.4190	0.3750	0.4220	0.2950
1 5/8	1.6250	1.6630	1.6330	2.5530	0.3890	0.4240	0.2970
1 3/4	1.7500	1.7890	1.7580	2.6790	0.3890	0.4240	0.2970
1 7/8	1.8750	1.9140	1.8830	2.8110	0.4220	0.4270	0.2990
2	2.0000	2.0390	2.0080	2.9360	0.4220	0.4270	0.2990
2 1/4	2.2500	2.2930	2.2620	3.2210	0.4400	0.4420	0.3090
2 1/2	2.5000	2.5430	2.5120	3.4710	0.4400	0.4420	0.3090
2 3/4	2.7500	2.7930	2.7620	3.8240	0.4580	0.4910	0.3440
3	3.0000	3.0430	3.0120	4.0740	0.4580	0.4910	0.3440

All dimensions are in inches.

Split Lock Washer

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Diameter Inside Diameter Outside Diameter Thickness Item # Availability Price Quantity UOM

5/8

0.6280

1.0730

0.1560

WLBL062

In Stock

$0.20711/EA

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5/8 SPLIT LOCK WASHER

$0.20711/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.20711/EA
420	$0.19458/EA
1670	$0.17222/EA
7500	$0.117/EA

3/4

0.7530

1.2650

0.1880

WLBL075

In Stock

$0.38776/EA

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3/4 SPLIT LOCK WASHER

$0.38776/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.38776/EA
250	$0.36453/EA
1000	$0.32237/EA
4500	$0.22027/EA

7/8

0.8780

1.4590

0.2190

WLBL087

In Stock

$0.48055/EA

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7/8 SPLIT LOCK WASHER

$0.48055/EA

Qty

In Stock

Product Detail

Quantity	Price
Quantity	Price
1	$0.48055/EA
170	$0.45205/EA
670	$0.39935/EA
3000	$0.27489/EA

Split Lock Washer

Technical Data

Governing Standards

Governing StandardsSplit Lock Washer

Dimensional Specifications

Dimensional SpecificationsSplit Lock Washer

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5/8 SPLIT LOCK WASHER

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