... )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 (304 ... ,5/16, 3/8MaterialCarbon steel, stainless steel and aluminiumHeadFlat head,small head,countersunk head, flat hexagon headBodyRound,knurled,semi-hexagon,full-hexagon,UsageThe best way of ...