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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Sep 2009 Posts: 5,980 Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT | | Gearhead, Stovebolt Tech and Parts Tracker, Mod for Swap Meet and GTT Joined: Sep 2009 Posts: 5,980 | Miller - The 1947-54 FAM says those bolts securing the rear cab mount to the frame and cab floor brace are common hex head bolts, GM# 120233. From what I could track down, the dimensions for those bolts are 7/16-14 x1 1/8" bolts and should be accompanied with 7/16" split lock washers. I couldn't find a designated bolt grade, but think at a minimum a Grade 5 is needed. Just to be on the safe side a Grade 8 wouldn't hurt. Hope this is helpful. 
~ Dan 1951 Chevy 3 window 3100Follow this story in the DITY Gallery"My Grandpa Carl's Truck and How it Became Mine"1966 Chevelle (Wife's Hot Rod) | 2013 Chevy Silverado (Current daily driver) US Army MSG Retired (1977-1998) | Com Fac Maint Lead Tech Retired (1998-2021)
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