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swamp rat · 02-29-2016, 04:56 AM

Don't know if your using 5/16, 3/8 or 7/16 but you should use Grade 8 bolts nuts and loc washers, note the zinc chromate finish, the bolts will have the 6 lines on the head of the bolt.

https://www.boltdepot.com/fastener-i...head-size.aspx

02-29-2016, 04:56 AM	#82
swamp rat Registered User Join Date: Oct 2007 Location: Spanaway Posts: 8,451	Re: 1970 K20 Restoration Don't know if your using 5/16, 3/8 or 7/16 but you should use Grade 8 bolts nuts and loc washers, note the zinc chromate finish, the bolts will have the 6 lines on the head of the bolt. https://www.boltdepot.com/fastener-i...head-size.aspx Attached Images __________________ Mike. Swamp Rat build thread : http://67-72chevytrucks.com/vboard/s...d.php?t=595019 72 3/4T 4X4 4" BDS Lift 33" BFG's