304 Stainless External Tooth Lock Washers

A complete kit of 300 external serrated lock washers manufactured from 304 stainless steel — known for its superior corrosion resistance, non-magnetic properties, and tensile strength. Sizes included: M2.5 (50 pcs), M3 (100 pcs), M4 (50 pcs), M5 (50 pcs), M6 (25 pcs), and M8 (25 pcs). Each washer has sharp, evenly spaced external teeth that deform slightly on tightening to create mechanical interference — enhancing resistance to self-loosening. Packaged in a compact, transparent polypropylene storage box (125 × 65 × 22 mm) with dedicated slots per size. Net weight approx. 60 g. Ideal for securing electrical terminals, control panel fittings, engine components, marine hardware, and high-integrity flanged joints in HVAC, process engineering, and laboratory equipment where long-term reliability under thermal stress is essential.