Stainless steel bolt 1, spec.: 12-50mm, wall: 0.8-2.0mm 2, ... ,AMSE 3, material: INOX AISI304,304L,316,316L Stainless steel bolt 1, The material can be SUS304,304L,316, or 316L ... systems, bulging system, groove systems.The only one factory in china producing both M-type( same with Mapress) and V-type ... government buildings, classy hospitals, star hotels water supply projects. hex bolt