Hey guys I'm building a 302 from the ground up and I bought all parts and pieces I needed to build the oil system but here's my problem none of the ARP bolts I bought come with the nut that hold down the oil pickup tube to the main cap stude on the block. Does anybody know what size nut and or what grade nut should I get for it? I tried looking everywhere but nobody online sells that nut

 

The nut should be 5/16-16 not sure what grade bolt .


OIL PUMP BOLTS there are 4 bolts
The bolts that hold the oil pump to the block are 3/8-16.
The bolts that hold the pick-up to the pump are 5/16-16.
Torque them to 25 ft lbs

 

Its either a 1/2-20 or 7/16-20. Cant remember which. Just a regular grade 5 lock nut will be fine since it doesnt hold anything. You just dont want it coming loose. If you cant find a mechanical lock nut then use a lock washer. Dont think id trust a nylock nut in an engine.