M4 Square Weld Nuts Plain Steel Weldable for Welding DIN 928 (Pack of 20)

Diameter: M4 Nut height: 3.5mm Width across flats: 7mm Welding projection height: 0.6mm The DIN 928 square weld nut is a specialist fastening element designed for permanent bonding to a metal substrate through electrical resistance welding. The square shape provides four gripping surfaces and a wide, stable base that sits flush against the welded component, resulting in an exceptionally secure and evenly distributed bond with the steel sheet or profile. The nut is supplied without a protective coating — the absence of zinc or lacquer eliminates the risk of weld contamination, spatter, and harmful fume generation during the welding process. Once correctly welded, it forms a permanent, non-detachable threaded connection that is resistant to vibration and spontaneous loosening.