K-Lock Nuts: Dimensions & Specifications

K-Lock Nuts Drawing

K-Lock Nuts: Dimensions 

Nominal or Basic Major Diameter of Thread

 Click on size to search products		 Width Across Flats (F)

 Width Across Corners (G) Thickness of Hex Jam Nuts (H)      Washer Diameter (I)
Basic Max Min  Max  Min  Max Min  Max Min
4 0.1120 1/4 0.250

0.241

 0.289 0.275 0.098

0.087

 0.286 0.277
5 0.1250 5/16 0.312 0.302 0.361 0.344 0.114 0.102 0.348 0.338
6 0.1380 5/16 0.312 0.302 0.361 0.344 0.114 0.102 0.348 0.338
6 SP 0.1380 1/4 0.250 0.241 0.289 0.275 0.098 0.087 0.287 0.277
8 0.1640 11/32 0.344 0.332 0.397 0.378 0.130 0.117 0.381 0.370
8 SP 0.1640 5/16 0.312 0.302 0.361 0.344 0.114 0.102 0.348 0.338
10 0.1900 3/8 0.375 0.362 0.433 0.413 0.130 0.117 0.406 0.395
12 0.2160 7/16 0.438 0.423 0.505 0.482 0.161 0.148 0.506 0.494
1/4 0.2500 7/16 0.438 0.423 0.505 0.482 0.193 0.178 0.506 0.494
5/16 0.3125 1/2 0.500 0.489 0.577 0.557 0.273 0.258 0.592 0.579
3/8 0.3750 9/16 0.562 0.551 0.650 0.628 0.385 0.365 0.665 0.651
1/2 0.5000 3/4 0.750 0.736 0.866 0.840 0.437 0.425 0.898 0.878

 

K-Lock Nuts: Performance & Mechanical Specs
Description A hex nut pre-assembled with a free spinning external tooth lock washer. The locking action is achieved when the nut is tightened against a bearing surface as the teeth of the lock washer dig into it.
Applications This is the most popular type of locknut because of its versatility, cost and ease of installation. Doesn't gall screw threads.
Material

Steel: Nuts AISI 1008-1020 or equivalent steel; Washers 1050-03 or equivalent steel.

Stainless: Nuts One of the following austenitic alloys: 303, 303Se, 304, XM7; Washers SAE 300-305 stainless.
Core Hardness

Steel: Washers Rockwell C38 minimum, C44 maximum

Stainless: Washers Rockwell C20-45