ITEM NAME:Assorted Stainless Crush Flat Washers Seal Flat Ring Pads Set 0f 100 M4 M6 Description: These flat washers are made of 304 stainless steel material, durable and strong, rust resistant galvanized finish to ensure long lasting results. Fender washers have a larger surface area than standard flat washers. Prevents a nut, bolt or screw from pulling through the material. Steel washers fit for home, automotive and shop use, it distributes the load of a fastener across a surface, you can use it as spacers, springs, shims or locking devices. 100 pieces of flat washers, enough for your daily using and replacement. Specification: Material: Stainless Steel Color: Silver Size: Approx. Inner diameter x Outer diameter x Thickness M4: 4.3x9x0.8mm/0.17x0.35x0.03inch; M6: 6.4x12x1.6mm/0.25x0.47x0.06inch; Package Includes: 50 Pieces M4 Flat Washers 50 Pieces M6 Flat Washers Note: Pls allow an error of 3-5mm due to the difference of manual measurement..50 Pieces M4 Flat Washers. 50 Pieces M6 Flat Washers. Fender washers have a larger surface area than standard flat washers. These flat washers are made of 304 stainless steel material, durable and strong, rust resistant galvanized finish to ensure long lasting results.