Stainless Steel Expansion Bolts, also known as stainless steel expansion anchors, are a type of mechanical fixing fastener. They consist of a bolt, expansion sleeve, washer and nut. When tightened, the nut pulls the bolt to expand the sleeve, which presses firmly against the wall hole to create friction and achieve anchoring. They are commonly made from 304 or 316 stainless steel.
Stainless Steel Expansion Bolts are manufactured from premium 304 or 316 stainless steel, providing excellent rust and corrosion resistance, suitable for outdoor, humid and corrosive working environments. Once installed into pre-drilled holes in concrete, brick or stone substrates, tightening the nut will expand the sleeve, generating strong holding force to secure fixtures to the base material. Easy to install and reliable in load-bearing performance, these expansion bolts are widely used for fixing railings, brackets, air-conditioning supports, pipeline hangers and other equipment on concrete and masonry surfaces.