For Domestic (for India) Email: sales4@dc-engg.com / Phone: +91-9136470619 / +91-22-6659 5894
For Exports (for other than India) Email: export4@dc-engg.com / Phone: +91-9136470618 / +91-22-2363 4824

"K" LOCK NUTS

Nominal Size or Basic Thread Diameter

Width Across Flats

Width Across Corners

Thickness

Washer Diameter

Hex

Basic

Max.

Min.

Max.

Min.

Max.

Min.

Ref.

1/4
5/16
11/32
3/8
7/16
1/2
9/16

0.250
0.312
0.344
0.375
0.438
0.500
0.562

0.241
0.302
0.332
0.362
0.423
0.489
0.551

0.289
0.361
0.397
0.433
0.505
0.577
0.650

0.275
0.344
0.378
0.413
0.482
0.557
0.628

0.098
0.114
0.130
0.130
0.193
0.273
0.385

0.087
0.102
0.117
0.117
0.178
0.258
0.365

0.281
0.344
0.375
0.406
0.500
0.578
0.656