5/16-18 x 2.250 12pt black oxide bolts

5/16-18 x 2.250 12pt black oxide boltsMaterial: 8740 Chrome Moly Finish: Black Material 2: Finish 2: Origin: USA

You’ll note that the studs have a radiused bullet nose that serves to locate the pan rails

The shaft is made from heat-treated

Our special purpose washers are constructed from either premium chrome moly with a black oxide finish or polished ARP stainless steel and are hardened and parallel-ground

and come in your choice of black oxide finished chrome moly or rust-proof stainless steel

The less drag on the motor

you may choose betweenconventional hex style or the space-saving 12-point nuts

000 psi tensile strength to provide you with plenty of clamping force

and come in your choiceof black oxide finished chrome moly or rust-proof stainless steel

A true high performance washer from ARP

All Pro Series head bolts have are reduced wrenching hex or 12-point head and wide area flange to permit the use of larger diameter valve springs and eliminate the need for valve train removal during cylinder head retorquing

Constructed from the finest aerospace-quality materials

These inexpensive fasteners can literally save your engine