These lock washers offer greater bolt tensioning when it comes to tighter assemblies. They also secure against loosening that results from vibration. These washers can be utilized with a standard washer in order to provide a uniform bearing surface. Split lock washers are meant for general use.

Stock

Diameters: 1/4– 3
Finish: Plain and hot-dip galvanized

Dimensions

Click table to show drawingLock Washer
Bolt Size A B C Weight (lbs.) Per 100 Pieces Part Numbers
Inside Diameter Max Outside Diameter Max Thickness Domestic Import
Min Plain Galvanized Plain Galvanized
1⁄2 0.512 0.869 0.125 1.3 11921 11922 11899 11900
5⁄8 0.641 1.073 0.156 2.4 11923 11924 11901 11902
3⁄4 0.766 1.265 0.188 4.3 11925 11926 11903 11904
7⁄8 0.894 1.459 0.219 6.0 11927 11928 11905 11906
1 1.024 1.656 0.250 8.8 11929 11930 11907 11908
11⁄8 1.153 1.847 0.281 12 - - 11909 11910
11⁄4 1.280 2.036 0.312 16 11931 11932 11911 11912
13⁄8 1.408 2.219 0.344 21.9 - - 11913 11914
11⁄2 1.534 2.419 0.375 28.2 11933 11934 11915 11916
13⁄4 1.789 2.679 0.389 30.35 - - 11917 11918
2 2.039 2.936 0.422 32.50 - - 11919 11920
21⁄4 2.293 3.221 0.440 39 - - 17497 17498
21⁄2 2.543 3.471 0.440 45 - - 19214 17499
23⁄4 2.793 3.824 0.458 50 - - 17501 17502
3 3.043 4.074 0.458 56 - - - -

Dimensions per ANSI B18.21.1 1999