M4 Type A External Tooth Lock Washer, Stainless Steel A2 (18‑8)

Manufactured from A2 (18‑8) stainless steel, this M4 Type A external tooth lock washer is designed to help prevent loosening caused by vibration and movement. The external teeth bite into the fastener head and mating surface to provide strong locking action and improved electrical contact. Excellent corrosion resistance makes it ideal for precision, electronic, industrial, and general‑purpose metric applications requiring secure fastening and long‑lasting durability.