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Click on image for the lowdown. 
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| | | Forums66 Topics128,157 Posts1,056,876 Members48,458 | | Most Online14,466
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!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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on the Internet for over 30 years! and not clogged down
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| | | | Joined: Jan 2015 Posts: 914 'Bolter | | 'Bolter Joined: Jan 2015 Posts: 914 | Also known as a Castle nut that adjusts the wheel bearing on the spindle. https://www.fillingstation.com/catalog/flippingbook/index.html#260/zScroll down towards the bottom of that page. Has them $2.25 each. 3/4" x 20 nut GM # 378137. Appears same part from 1935 to 1972. Chevys of the 40's has the nuts with the washer that goes on before the nut. They list the same GM#.
Last edited by 32vld; 07/08/2015 2:22 AM.
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