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Packing: (100pcs)3/8-16 nylon insert hex stainless steel lock nut
Internal dimension of thread: 3/8-16; Thread Pitch: 16 TPI Coarse Thread UNC;
Hex Drive Size: 9/16"; Width From Flat to Flat: 0.551 inch to 0.564 inch; Overall Height: 0.438 inch to 0.468 inch;
High quality material: Made of stainless steel 304 (18-8), it has good strength and corrosion resistance in harsh environments, without time-consuming and laborious maintenance.
Prevent loosening: There is a nylon plug-in inside the lock nut to increase friction and prevent falling off