MewuDecor M4 Metric Black Nylon Insert Hex Lock Nuts Locknuts, Stainless Steel 18-8 (304), Black Finish, 100 PCS

Product Specification Nylon lock nuts differ from a standard hex nut in that they have a nylon insert secured within the nut. The nylon insert is located in a tapered section located at the back of the nut. When you install the nylon lock nut onto a bolt or threaded stud, the nylon insert wraps around the threads and locks the nut in place. System of Measurement : Metric Inside Diameter : 4 mm Pitch Size : 0.7 mm Exterior Finish : Black Oxide Material 18-8 (304) Stainless Steel Package Included 100 x Hex Lock Nuts Warranty MewuDecor hardware has the highest quality on the market. Buy with confidence. Money back or exchange guarranteed.