Silicon Bronze Split Lock Washer
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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.

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 SpecificationsSplit Lock Washer

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