Durlok / Nord Washer

The Durlok System functions as a dependable wedge lock washer solution, comprising specially designed bolts and nuts with radial serrations on the flange surface that engage both the fastener and the bearing material. Acting as a high-performance anti vibration washer, this design produces moderate but sufficient edge pressure to guarantee self-locking without damaging or grooving the clamped material. The Nord washer principle behind Durlok means fasteners are fully reusable, as their serration pattern maintains locking ability even after multiple assemblies. As a truly reliable self locking washer system, it works effectively across a broad range of materials, including hardened steels, cast irons, non-ferrous metals, and sheet materials. Designed for high tensile strength and vibration resistance, Durlok fasteners deliver enhanced safety, reduced maintenance, and improved performance in critical engineering applications.