供应12.9级高强度马车螺栓 半圆方颈螺栓 圆头方颈螺栓 加工马车螺栓 南通东明五金

马车螺栓 标准: DIN ANSI BS GB 材料：碳钢、合金钢、不锈钢、铜、铝； 表面处理：白锌、黑锌、彩锌、热镀锌、镀铬、镀镍、达克罗； 等级：4.8~12.9级、A2~70； 规格：M2~M42； 公称长度范围：5~1000mm 螺纹: 公制,粗牙,细牙,英制 机械性能:4.8、5.8、6.8、8.8、9.8、10.9、12.9 表面处理: 自然色,镀锌,发黑,镀镍,镀铬,热镀锌 包装: 纸箱,纸盒,麻袋,托盘 Carriage bolts Standards: DIN ANSI BS GB Material: carbon steel, alloy steel, stainless steel, copper or aluminium; Surface treatment: zinc white, black, hot zinc galvanized, color galvanized, chrome, nickel plating, Dacromet; Grade: grade 4.8~12.9, A2~70; Size: M2~M42; Size: M2~M42; Nominal length range: 5~1000mm Thread: metric, coarse thread, and fine teeth, inch Mechanical properties: 4.8, 5.8, 6.8, 8.8, 10.9, 12.9 Surface treatment: natural, galvanized, black, nickel plating, chrome plating, galvanizing Packing: cardboard boxes, trays, sacks, and trays