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Internal Tooth Lock Washer, Plated

Selected Internal Tooth Lock Washer Steel PlatedInternal Tooth Lock Washer, Plated
Internal Tooth Lock Washer Steel PlatedInternal Tooth Lock Washer, Plated

Low carbon internal tooth lock washers are used under bolt heads or nuts to increase the hold of the fastener. Internal tooth lock washers have teeth on the inner dimension of the washer creating a ratchet action by biting into the nut or screw head and the surface it contacts. Dimensional specifications are governed by ASME B18.21.1. Available in zinc plated finish. Zinc plating sacrifices itself, corroding before the base material, offering added corrosion resistance.

Products

Dimensional Specifications

Split Lock Washer dimensions
Per ASME B18.21.1-2009
Size Nominal Inside
Diameter		 Outside
Diameter		 Mean Section
Thickness
Max Min Max Min Max Min
#2 0.0860 0.0950 0.0890 0.2000 0.1750 0.0160 0.0100
#3 0.0990 0.1090 0.1020 0.2320 0.2150 0.0160 0.0100
#4 0.1120 0.1230 0.1150 0.2700 0.2450 0.0180 0.0120
#5 0.1250 0.1360 0.1290 0.2800 0.2550 0.0200 0.0140
#6 0.1380 0.1500 0.1410 0.2950 0.2750 0.0220 0.0160
#8 0.1640 0.1760 0.1680 0.3400 0.3250 0.0230 0.0180
#10 0.1900 0.2040 0.1950 0.3810 0.3650 0.0240 0.0180
#12 0.2160 0.2310 0.2210 0.4100 0.3940 0.0270 0.0200
1/4 0.2500 0.2670 0.2560 0.4780 0.4600 0.0280 0.0230
5/16 0.3125 0.3320 0.3200 0.6100 0.5940 0.0340 0.0280
3/8 0.3750 0.3980 0.3840 0.6920 0.6700 0.0400 0.0320
7/16 0.4375 0.4640 0.4480 0.7890 0.7400 0.0400 0.0320
1/2 0.5000 0.5300 0.5120 0.9000 0.8670 0.0450 0.0370
9/16 0.5625 0.5960 0.5760 0.9850 0.9570 0.0450 0.0370
5/8 0.6250 0.6630 0.6400 1.0710 1.0450 0.0500 0.0420
3/4 0.7500 0.7950 0.7690 1.2450 1.2200 0.0550 0.0470
7/8 0.8750 0.9270 0.8940 1.4100 1.3640 0.0600 0.0520
1 1.0000 1.0600 1.0190 1.6370 1.5900 0.0670 0.0590
  1. All dimensions are in inches.

Governing Standards

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).