... /16, 1/4... 2)carbon steel, stainless steel,aluminium 3)RoHS Compliant; TS-16949(including ISO 9001 carbon nut furniture nut insert ... accomodate a tapped thread.*Can be widely used in the industries such as railway, elevator, refrigeration facility, medical equipment and ... 32, 3/16, 1/4,5/16, 3/8MaterialCarbon steel, stainless steel and aluminiumHeadFlat head,small head,countersunk head, flat hexagon ...