Bolt Size?

[Vince@Meanstreets]

Originally Posted by MtotheIKEo

You're fine. I believe Carl is referencing SS bolts found at your local hardware store. They generally have a pretty low UTS, about as strong as a Grade 2 bolt. The below link shows what is typically found at hardware stores, 70ksi tensile strength....
http://www.mcmaster.com/#socket-head...crews/=109atn3

ARP, DSE body bolts, etc... are VERY strong. See the link below for McMaster-Carr 12-point stainless cap screws with 170ksi tensile strength.
http://www.mcmaster.com/#standard-cap-screws/=109aspp

Link to ARP's stainless explanation (also 170ksi tensile strength)
http://arp-bolts.com/p/technical.php

mcmaster carr sells arp but its higher cost than summit or direct

what i usually do is figure out what size i need then say if its a 5/16" x 18 x 1" bolt I'll look for a differential kit. 12 bolt chevy kit has 12 bolts 5/16" x 18 x 1" with washers. if you buy them separate or a 5 pack they will cost average is $2.40 a bolt plus the washers. it a 12 bolt diff kit you may spend $1.75 per bolt and that comes with the washers.

same with the 3/8" x 16 x 1.25" bolts, i'll buy a chevy intake manifold kit, 12 bolts w/ washers for $2.91 each and the 5 packs are $3.10 each. every little penny helps