damping rubber screw material :carbon steel size:1/4-1" coating:zinc yellow ,zinc blue damping rubber screwmaterial :carbon steel ,with rubber size:1/4-1"coating:zinc yellow ,zinc blue Feature: 1) Standards: DIN & ANSI & JIS2) Material: carbon steel ,SS304 or SS 3163) Size: M4-M24,1/4"--1"4)Coating:ZINC ,HDG, BRIGHT5)Thread:FINE ,CROSE ,METRIC 6) Quality control :ISO 90017)Package :Small box , ...