Silicon Bronze Split Lock Washer

Silicon Bronze split lock washers are used under Silicon Bronze 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

Governing Standards

Governing StandardsSplit Lock Washer

ASME B18.21.1

Covers the dimensional requirements, physical properties, and related test methods for helical spring-lock washers (#0 through 3 inches), tooth-lock washers (#2 through 1 ¼ inches), and plain washers (#0 through 3 inches).

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

All dimensions are in inches.

Silicon Bronze Split Lock Washer

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Diameter	Inside Diameter	Outside Diameter	Thickness	Item #	Availability	Price	Quantity
#4	0.12	0.2090	0.0250	WLSB 4	In Stock	$0.04066/EA	EA	EA
#6	0.1480	0.25	0.0310	WLSB 6	In Stock	$0.05488/EA	EA	EA
#8	0.1740	0.2930	0.04	WLSB 8	In Stock	$0.04356/EA	EA	EA
#10	0.2	0.3340	0.0470	WLSB 10	In Stock	$0.047/EA	EA	EA
#12	0.2270	0.3770	0.0560	WLSB 12	In Stock	$0.09309/EA	EA	EA
1/4	0.26	0.4870	0.0620	WLSB025	In Stock	$0.1067/EA	EA	EA
5/16	0.3220	0.5830	0.0780	WLSB031	In Stock	$0.18855/EA	EA	EA
3/8	0.3850	0.68	0.0940	WLSB037	In Stock	$0.29739/EA	EA	EA
7/16	0.45	0.7760	0.1090	WLSB043	In Stock	$0.51245/EA	EA	EA
1/2	0.5120	0.8690	0.1250	WLSB050	In Stock	$0.56202/EA	EA	EA
5/8	0.6410	1.0730	0.1560	WLSB062	In Stock	$0.88084/EA	EA	EA
3/4	0.7660	1.2650	0.1880	WLSB075	In Stock	$1.80749/EA	EA	EA