Check the listing for details. 100 Pcs Spring Lock Washer M4 304 Stainless Steel Split Lock Washer. Condition: New. Listed at 9.17 USD. 316 stainless split lock washers are commonly used fasteners and are suitable for fastening assembly, mechanical equipment, bicycles automatic, and electronic equipment. They increase connection stability, reduce looseness and vibration, and decrease load pressure to prevent excessive local stress by providing elastic pressure and cushioning effects.SpecificationWasher Specifications: M4Material: 316 Stainless SteelWasher Size: 4.3 x 6.5 mm / 1/6" x 1/4"(ID*OD)Thickness: 1.2 mm / 0.05 inchPacking List: 100 Pcs x Spring WasherAdvantage1. The lock Washer is made of 316 stainless steel, which is complete specifications, with high hardness, strong toughness, wear resistance, rustproof, high corrosion resistance, and durability.2.