M6 Rubber Well Nuts for Fairing and Screen Fixing.This pack of 50 well nuts is designed for motorcycle and ATV applications including windscreens, body panels, fairings, fenders, bumpers, cowls, and trims.These units feature a neoprene construction with a captive brass thread insert and a flat-convex head design.They are intended to replace missing or damaged fasteners to restore assembly conditions.Specifications include an M6 thread size, a required hole diameter of 13mm (1/2 inch), a shank diameter of 12.4mm, a head diameter of 16.5mm, a flat head thickness of 1.3mm, and an overall length of 15.6mm.Color is black.Please verify dimensions against your vehicle requirements before purchase.Compatible with various motorcycles, motorbikes, and superbikes using M6 fasteners in 13mm holes.