316 SS Split Lock Washer
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316 SS Split Lock Washer

316 Stainless Steel 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. 316 stainless steel fasteners are commonly used in applications that require general atmospheric corrosion resistance, such as chemical and food processing equipment.

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 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. All dimensions are in inches.
316 SS Split Lock Washer
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Diameter Inside Diameter Outside Diameter Thickness Item # Availability Price Quantity UOM
#6 0.1410 0.25 0.0310 WLS6 6 In Stock $0.12709/EA EA
#8 0.1670 0.2930 0.04 WLS6 8 3-5 Working Days $0.04434/EA EA
#10 0.1930 0.3340 0.0470 WLS6 10 In Stock $0.02595/EA EA
1/4 0.2520 0.4870 0.0620 WLS6025 In Stock $0.04577/EA EA
5/16 0.3140 0.5830 0.0780 WLS6031 In Stock $0.11105/EA EA
3/8 0.3770 0.68 0.0940 WLS6037 In Stock $0.09452/EA EA
7/16 0.44 0.7760 0.1090 WLS6043 In Stock $0.30339/EA EA
1/2 0.5020 0.8690 0.1250 WLS6050 In Stock $0.23526/EA EA
9/16 0.5640 0.9650 0.1410 WLS6056 3-5 Working Days $1.1926/EA EA
5/8 0.6280 1.0730 0.1560 WLS6062 In Stock $0.38485/EA EA
3/4 0.7530 1.2650 0.1880 WLS6075 In Stock $0.75717/EA EA
7/8 0.8780 1.4590 0.2190 WLS6087 In Stock $1.01939/EA EA
1 1.0030 1.6560 0.25 WLS6100 In Stock $1.59541/EA EA
1 1/8 1.1290 1.8470 0.2810 WLS6112 In Stock $1.72304/EA EA
1 1/4 1.2540 2.0360 0.3120 WLS6125 In Stock $2.78877/EA EA