Product Name: ASTM F436 Flat Washers Model NO.: F436/DIN6916 Material: Carbon Steel Type: Flat Gasket The Standard: ASTM F436, DIN6916 Size: 1/4"-4" Surface: Black, Zp, Zy, etc. Sample: Free Trademark: Milfast Transport Package: 25kgs Per Box, 36 Boxes Per Pallet Specification: ASTM, DIN, ANSI, ISO etc. Origin: China Product Description Flat Washers ASTM F436 / DIN69161). Standard: ASTM F436 washer, F436M washer, DIN6916 washer, AS1252 washer2). Material: Carbon, alloy, stainless, etc.3). Surface: Black, ZP, ZY, etc.4). Packaging: 25kgs per box, 36 boxes per palletCompetitive Advantages,1). Top Quality control2). Competitive Price3). Various of Design4). OEM Accepted5). Customer's Design and Logo are Welcome