Hex Drive Size: 1/2"; Width From Flat to Flat: 0.489 inch to 0.502 inch; Overall Height: 0.329 inch to 0.359 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