Binding Barrel Bolt Screw Finish Plain Material 18-8 Stainless Steel Screw Head Style Truss Screw Drive Style Tamper-Resistant Torx Thread Size 1/4 In.-20 Screw Minimum Thread Length 1/4 in Barrel Drive Type Tamper-Resistant Torx Barrel Drive Size T27 Material Quality Standards ASTM A582 Pack Size Small