... to M12; BS-5/32, 3/16, 1/4... 2)carbon steel, stainless steel,aluminium 3)ROHS Compliant; ... , blindSize :GB-M3 to M12, inch 5/32, 3/16, 1/4,5/16, 3/8Surface tratement: Yellow/white/black zinc ... on SizeGB-M3 to M12; inch 5/32, 3/16, 1/4,5/16, 3/8MaterialCarbon steel, stainless steel and aluminiumHeadFlat ... you with the good quality and competitive price. stainless steel pop rivets nut;wheel nut