ARP 6111250 Stainless Steel 1/4-20 12-Point Bolts - Pack of 5 Bolts have a diameter of 1/4", a standard thread pitch of 20, an under head length of 1.250, and the wrenching is 5/16 Rated at 170,000 PSI, which is considerably stronger than Grade 8 hardware Manufactured from polished Stainless 300 steel, a proprietary alloy that is impervious to rust and corrosion Heads are compact 12-point style Packaged on convenient 5-pack card