Flange Locknuts

Hex nut with a serrated bearing surface beneath the flange that displaces material on the mating surface when the nut is torqued down, forming a connection that resists loosening. Used in applications where vibration is an issue.

Product Name

1/4-20 HEX FLANGE LOCK NUTS - USS [FN2394] Price: $4.18 / Box of 25
5/16-18 HEX FLANGE LOCK NUTS - USS [FN2396] Price: $6.88 / Box of 25
3/8-16 HEX FLANGE LOCK NUTS - USS [FN2400] Price: $11.00 / Box of 25
7/16-14 HEX FLANGE LOCK NUTS - USS [FN2401] Price: $15.13 / Box of 25
1/2-13 HEX FLANGE LOCK NUTS - USS [FN2402] Price: $15.40 / Box of 25
5/8-11 HEX FLANGE LOCK NUTS - USS [FN2404] Price: $26.46 / Box of 25
3/4-10 HEX FLANGE LOCK NUTS - USS [FN2406] Price: $49.50 / Box of 25
7/8-9 HEX FLANGE LOCK NUTS - USS [FN2408] Price: $193.33 / Box of 25
7/16-20 HEX FLANGE LOCK NUTS - SAE [FN3398] Price: $30.69 / Box of 25
1/2-20 HEX FLANGE LOCK NUTS - SAE [FN3400] Price: $22.00 / Box of 25
5/8-18 HEX FLANGE LOCK NUTS - SAE [FN3402] Price: $36.03 / Box of 25
3/4-16 HEX FLANGE LOCK NUTS - SAE [FN3404] Price: $61.88 / Box of 25
1-14 HEX FLANGE LOCK NUTS - SAE [FN3406] Price: $217.25 / Box of 25
7/8-14 HEX FLANGE LOCK NUTS - SAE [FN3408] Price: $195.25 / Box of 25

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