Drawn ARC Studs Threaded and un-threaded studs, Collar Studs, Headed Shear Connectors, bended , tapped studs, refractory anchors Diameter : 3 up till 30 mm diameter. Material : Low Carbon Steel, Grade 8.8 Steel, Stainless Steel 304, 304 L, 316 L, 316 Ti , 310, Aluminum, Inconel.