Spring Washer Lock Wave Washers Assortment Kit Set Stainless Steel M3–M12 350pcs
M12 – 20pcs. Wide range from M3 to M12. M3 – 80pcs. Wave / spring design for tension retention. Washer Sizes & Quantities Prevents bolts loosening under vibration. 304 stainless steel (anti-rust, high strength).