K Lock Nuts

K Lock Nut image

K Lock Nuts - Shakeproof #501-01

Nominal Size
or Basic Major
Thread Diameter
F G H I
Width
Across Flats
Width
Across Corners
Thickness Washer Diameter
Basic Max Min Max Min Max Min Max Min
4 .1120 1/4 .250 .241 .289 .275 .098 .087 .286 .277
5 .1250 1/4 .250 .241 .289 .275 .098 .087 .287 .277
6 .1380 5/16 .312 .302 .361 .344 .114 .102 .348 .338
6SP .1380 1/4 .250 .241 .289 .275 .098 .087 .287 .277
8 .1640 11/32 .344 .332 .397 .378 .130 .117 .381 .370
8SP .1640 5/16 .312 .302 .361 .344 .114 .102 .381 .370
10 .1900 3/8 .375 .362 .433 .413 .130 .117 .406 .395
12 .2160 7/16 .438 .423 .505 .482 .161 .148 .506 .494
1/4 .2500 7/16 .438 .423 .505 .482 .193 .178 .506 .494
5/16 .3125 1/2 .500 .489 .577 .557 .273 .258 .592 .579
3/8 .3750 9/16 .562 .551 .650 .628 .385 .365 .665 .651
1/2 .5000 3/4 .750 .736 .866 .840 .437 .425 .898 .878
Shakeproof is the original writer of the K-Lock specifications.
SP denotes a "small pattern" across the flats. #8SP dimensions are independent of the Shakeproof specifications.


K-lock Nut Properties

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 lock nut because of its versatility. It doesn't gall the screw threads.
Material Steel: Nuts: AISI 1008-1020 or equivalent steel Washer: 1050-03 or equivalent steel.
Stainless: Nuts: One of the following austenitic alloys: 303, 303SE, 304, or XM7 Washer: SAE 300-304 stainless
Hardness Steel: Washers: Rockwell C38 - C44
Stainless: Washers: Rockwell C20 - C45
Plating See plating page for plating information of steel nuts.

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Grades 5 and 8 Finished Hex Nut Dimensions | Class 2B Internal Thread Dimensions



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