... /32, 3/16, 1/4... 2)carbon steel, stainless steel,aluminium 3)RoHS Compliant; TS-16949(including ISO ... Material: carbon steel(C1006A,1008A,1010A),stainless steel (304,316) aluminium(5052,5056)Head type Flat head, small/reduced head, csk headBody ... 1/4,5/16, 3/8MaterialCarbon steel, stainless steel and aluminiumHeadFlat head,small head,countersunk head, flat hexagon headBodyRound,knurled,semi-hexagon, ...