304 Stainless Steel Black Hex Nylon Insert Lock Nut Self-locking Locknut T

25pcs high quality hex self-locking Nylock nut. silver color nut: 304 stainless steel. black color nut: carbon steel (black zinc-plated). 0.4mm(M2) / 0.45mm(M2.5) /0.5mm(M3) /0.6mm (M3.5) / 0.7mm(M4) /0.8mm(M5) /1.0mm(M6).

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