Accuracy International internal shakeproof washers, sized for M4 fixings, supplied as a pack of 4. These washers are designed to provide anti-vibration locking, helping prevent fasteners from loosening under recoil or repeated use.
Manufactured to AI’s exacting standards, they ensure secure fastening, reliable performance, and long-term durability. Ideal for repair, maintenance, or assembly work, particularly where maintaining correct factory specification is essential.
Correct AI Part Number: 1199.
