Locking Nuts

A lock nut is a type of nut that resists loosening when properly threaded onto a bolt. Nut-and-bolt fasteners are extremely common in industry and home applications. You can learn more in our complete locking nuts guide.

Lock nuts fall into one of two groups:
● Prevailing Torque Lock Nuts - Prevailing torque is the amount of torque needed to run a nut down a thread on nuts that are designed to resist self-loosening under vibratory forces.
● Surface bearing lock nuts – surface bearing - a free spinning nut that requires tightening against a bearing surface in order for the locking mechanism to function.

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Description Price Thread Size Type Material Stainless Steel Type Width Finish
RS Stock No. 664-4873
Mfr. Part No.KN M3
£4.48
1 Bag of 10
Bag(s)
M3 Knurled Nut Brass - - Nickel Plated
RS Stock No. 664-4886
Mfr. Part No.KN M5
£5.00
1 Bag of 10
Bag(s)
M5 Knurled Nut Brass - - Nickel Plated
RS Stock No. 664-4877
Mfr. Part No.KN M4
£6.16
1 Bag of 10
Bag(s)
M4 Knurled Nut Brass - - Nickel Plated