1)GB-M3 to M12; BS-5/32, 3/16, 1/4... 2)carbon steel, stainless steel,aluminium 3)RoHS Compliant; TS- ... 16949(including ISO 9001 carbon nut furniture nut insert nuts:Material: carbon steel(C1006A,1008A,1010A),stainless steel ( ... 4,5/16, 3/8MaterialCarbon steel, stainless steel and aluminiumHeadFlat head,small head,countersunk head, flat hexagon headBodyRound,knurled,semi-hexagon,full ...