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RS PRO Hex Nuts - A2 Stainless Steel Locking Half Nut

The RS PRO A2 stainless steel locking half nuts have been designed for you to use when a nut has to be locked without clamping against another object.
Hex nuts are the most common hexagonal fastener that has internal threads that screw on to the shank of a bolt or a hex cap screw.

Standards

DIN 439 – Hexagon thin nuts