SpzcdZa M4x0.7mm Nylon Insert Hex Lock Nuts 50pcs 304 Stainless Steel Nylon Insert Hex Lock Nuts for Industrial and Construction Fasteners

???SpzcdZa M4 x 0.7mm 304 Stainless Steel Nylon Insert Hex Lock Nuts ???Specifications:? ?Material: 304 Stainless Steel ?Thread Size: M4 ?Pitch: 0.5mm ?Hex Width: 7mm / 0.28" ?Height: 5mm / 0.2" ?Package Content: 50 x Hex Lock Nuts ???Features:? 1.Made of high quality 304 Stainless Steel and nylon insert, fine workmanship, greatly enhancing the function of release and shockproof 2.Nylon lock nut is a round nut, and in its outer open four small slot, you can use the crescent wrench screw on the stud, the lock nut should be equipped with a shaft Washer, it can be used to make the small groove on the stud and its peripheral groove relative to the fixed, to prevent its loose. 3.Bolt thread on the nuts embedded in the nylon extrusion, making the nylon deformation, after installation, the nylon and thread completely squeeze contact, the extruded nylon to the bolt A lot of resilience, increased friction, so that the bolt is not easy to loose. ???Package Included:? ?M4x 0.7mm 304 Stainless Steel Self-Lock Nylon Inserted Hex Lock Nuts 50 PCS