Description:Material: Made of 304 stainless steel for rust protection, durability, and long service life, more durable than ordinary stainless steel. High hardness, not easy to deform. Can be used in outdoor humid environments.Feature: Special wing design, increases the lateral bearing surface and makes it easier to fasten, can be used repeatedly.Applications: Machinery and equipment, electronic equipment, communications equipment, hardware lighting, building bridges, and furniture decoration which require insulation, frequent disassembly, and maintenance.Specification:Product Name: Wing Butterfly ScrewMaterial: 304 Stainless SteelThread Size: M8x16mm/M8x0.63"(D*L)Pitch: 1.25mmHead Size: 13x30mm/0.51"x1.18"(D*T)Head High: 16mm/0.63"Main Color: Silver TonePackage Content: 30pcs x Wing Butterfly Screw