Flange Bolts Basic Material Steel Material Grade Alloy Steel Fastener Finish Plain Dia/Thread Size 1/4 In.-20 Fastener Length 3/4 in Fastener Thread Direction Right Hand Fastener Thread Type UNC (Coarse) Fastener Thread Style Fully Threaded Fastener Industry Standards ASTM A574 IFI-115 Thread Length 1 1/4 in Head Height 17/64 in Head Width 1/4 in Flange Dia 3/8 in Proof Load 140 000 psi Tensile Strength 170 000 psi Rockwell Hardness HRC37 Package Quantity 100