spring nut, channel nut stainless steel spring nut. sample are free of charge M6,M8,M10,M12 offer Amercian standard specification : spring nut, channel spring nut stainless steel spring nut.,channel nutssample are free of chargeM6,M8,M10,M12 offeredAmercian standard : 3/8" 1/2" etcsurface treatment : electro -galvanised , Hot dipped galvanised , SS304,SS316.etc.