... to M12; BS-5/32, 3/16, 1/4... 2)carbon steel, stainless steel,aluminium 3)RoHS Compliant; TS-16949(including ... /4,5/16, 3/8MaterialCarbon steel, stainless steel and aluminiumHeadFlat head,small head,countersunk head, flat hexagon headBodyRound,knurled,semi-hexagon,full-hexagon,UsageThe ...