K-Lock Nuts
Pre-Assembled External Tooth Washer & Nut
" External Lockwasher K-Lock Nuts "

K-Lock Lockwasher ( K-Lock Lock-Washer ) ( Steel, Zinc Plated )
    01. NUT-HXKL-     4X40-SZ (P/N: 04NK) - Size:      4-40x    1/4, 5000 pcs/ctn,   1.20 lbs/1K
    02. NUT-HXKL-     5X40-SZ (P/N: 05NK) - Size:      5-40x  5/16, 5000 pcs/ctn,   2.12 lbs/1K
    03. NUT-HXKL-     6X32-SZ (P/N: 06NK) - Size:      6-32x  5/16, 5000 pcs/ctn,   2.17 lbs/1K
    04. NUT-HXKL-     8X32-SZ (P/N: 08NK) - Size:      8-32x11/32, 5000 pcs/ctn,   2.84 lbs/1K
    05. NUT-HXKL-   10X24-SZ (P/N: 10NK) - Size:    10-24x    3/8, 4000 pcs/ctn,   3.30 lbs/1K
    06. NUT-HXKL-   10X32-SZ (P/N: 11NK) - Size:    10-32x    3/8, 4000 pcs/ctn,   3.40 lbs/1K
    07. NUT-HXKL-   12X24-SZ (P/N: 12NK) - Size:    12-24x  7/16, 3000 pcs/ctn,   5.80 lbs/1K
    08. NUT-HXKL-  1/4X20-SZ (P/N: 14NK) - Size:   1/4-20x  7/16, 2000 pcs/ctn,   6.60 lbs/1K
    09. NUT-HXKL-  1/4X28-SZ (P/N: 15NK) - Size:   1/4-28x  7/16, 2000 pcs/ctn,   6.10 lbs/1K
    10. NUT-HXKL-5/16X18-SZ (P/N: 31NK) - Size: 5/16-18x    1/2, 1500 pcs/ctn, 11.60 lbs/1K
    11. NUT-HXKL-5/16X24-SZ (P/N: 32NK) - Size: 5/16-24x    1/2, 1500 pcs/ctn, 11.50 lbs/1K
    12. NUT-HXKL-  3/8X16-SZ (P/N: 37NK) - Size:   3/8-16x  9/16, 1000 pcs/ctn, 16.10 lbs/1K
    13. NUT-HXKL-  3/8X24-SZ (P/N: 38NK) - Size:   3/8-24x  9/16, 1000 pcs/ctn, 16.40 lbs/1K
    14. NUT-HXKL-  1/2X13-SZ (P/N: 50NK) - Size:   1/2-13x    3/4, 1000 pcs/ctn, 39.80 lbs/1K

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/Advantages
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.

Hardness
Steel: Washers - Rockwell C38 minimum, C44 maximum
Stainless: Washers - Rockwell C20 - 45

Plating See Appendix-A for information about the plating of steel nuts.

> “SP” denotes a “small pattern” across the flats
> Shakeproof is the original writer of K-lock nut specifications.
> Shakeproof standard #501-01 does not specify dimensions for the #5, #8 SP, and 1/2” diameters.