arp bolts, 12-point head, custom 450, black oxide, 5/16 in.-18 rh thread, 0.750 in. uhl, set of 5

Now you can use premium-quality ARP chromoly bolts to install most anything on a car, boat, or trailer. These specially heat-treated 8740 chromoly fasteners feature a black oxide finish. They are nominally rated at 180,000 psi tensile strength to provide a substantial extra margin of safety over Grade 8 hardware.