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Product Details:  Parameter: Item Din933,Din931,hex bolt Material Carbon steel,SS304,, Size M6-M30 or non-standard as request&design Size 40mm-300mm or non-standard as request&design Grade 4.8 6.8 8.8 10.9 Surface Black, galvanized, bule white, etc Standard GB,DIN,ISO,, Non-standard OEM is available if you provide drawing or sample. Package Small box+ carton / 25kg bag Delivery time In stock within 7workdays. OEM or customize about 25~40days. Samples Available ...