STAINLESS STEEL NORD-LOCK

Nord-Lock

Nord-Lock Washers are wedge-locking washers supplied as glued pairs, each pair featuring radial cam faces on the mating side and wedge-shaped ramps on the outer face. Rather than relying on friction to resist loosening — as a spring washer or serrated washer does — Nord-Lock washers use a tension-based locking principle: any movement that would tend to loosen the joint acts to increase the wedge tension between the pair rather than releasing it.

Materials
Nord-Lock Washers – Glued Pairs are supplied through PTS's stainless steel washer range.

FAQs
How do Nord-Lock washers work?
Each Nord-Lock pair has cam faces on the inner sides that interlock with each other, and wedge-shaped ramps on the outer faces that sit against the bolt head and the joint face. If the joint experiences any rotation that would normally loosen a standard fastener, the cam faces ride up on each other, which increases the wedge tension in the assembly rather than allowing the washers — and the fastener — to loosen.

Why are they supplied as glued pairs?
The two washers in a Nord-Lock pair are designed to work together, with their cam faces matched to interlock correctly. Supplying them pre-glued as a pair keeps them correctly aligned and prevents them from being separated or mismatched during handling and installation, ensuring the wedge-lock action works as intended.