Click on image for the lowdown.
====
Forums66
Topics128,194
Posts1,057,263
Members48,466
Most Online14,466Apr 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!
THANKS!
For helping keep this great
old truck web site
on the Internet for
over 30 years! and not clogged down with Ads! Again, thanks!
Joined: Feb 2019
Posts: 4,512
AD Addict & Tinkerer
AD Addict & Tinkerer
Joined: Feb 2019
Posts: 4,512
I find this interesting. As you can see in the picture, my bolt head has five lines with a circle and an “M” in the middle. I’ve looked for the last half hour on the internet and can’t find any place to identify the grade of this bolt . I’ve even consulted my bible, Machinery Handbook to no avail. Anybody care to take a shot?
Attachments
Phil
Moderator, The Engine Shop, Interiors and Project Journals 1952 Chevrolet 3100 , Three on the Tree, 4:11 torque tube
Updated to: ‘59 235 w/hydraulic lifters, 12v w/alternator, HEI, PCV and Power front Disc Brakes Project Journals Stovebolt Gallery Forum
Entire Thread
So, you think you're smarter than GM?
52Carl 09/18/2019 12:47 AM
Re: So, you think you're smarter than GM?
TUTS 59 09/18/2019 1:45 AM
Re: So, you think you're smarter than GM?
Grigg 09/18/2019 1:50 AM
Re: So, you think you're smarter than GM?
Phak1 09/18/2019 2:42 AM
Re: So, you think you're smarter than GM?
Gord&Fran 09/18/2019 3:50 AM
Re: So, you think you're smarter than GM?
bartamos 09/18/2019 4:33 AM
Re: So, you think you're smarter than GM?
52Carl 09/18/2019 5:36 AM
Re: So, you think you're smarter than GM?
bartamos 09/18/2019 5:40 AM
Re: So, you think you're smarter than GM?
tclederman 09/18/2019 11:07 AM
Re: So, you think you're smarter than GM?
Phak1 09/18/2019 11:34 AM
Re: So, you think you're smarter than GM?
Lightholder's Dad 09/18/2019 4:51 PM
Re: So, you think you're smarter than GM?
bartamos 09/18/2019 6:46 PM
Re: So, you think you're smarter than GM?
Hotrod Lincoln 09/18/2019 11:17 PM
Re: So, you think you're smarter than GM?
2-Ton 09/18/2019 11:40 PM
Re: So, you think you're smarter than GM?
bartamos 09/19/2019 12:09 AM
Re: So, you think you're smarter than GM?
Hotrod Lincoln 09/19/2019 12:27 AM
Re: So, you think you're smarter than GM?
52Carl 09/19/2019 1:32 AM
Re: So, you think you're smarter than GM?
bartamos 09/19/2019 2:44 AM
Re: So, you think you're smarter than GM?
52Carl 09/19/2019 6:01 PM
Re: So, you think you're smarter than GM?
2-Ton 09/19/2019 3:01 AM
Re: So, you think you're smarter than GM?
Hotrod Lincoln 09/19/2019 3:29 AM
Re: So, you think you're smarter than GM?
Phak1 09/19/2019 12:36 PM
Re: So, you think you're smarter than GM?
Volfandt 09/19/2019 1:06 PM
Re: So, you think you're smarter than GM?
Phak1 09/19/2019 1:47 PM
Re: So, you think you're smarter than GM?
Hotrod Lincoln 09/19/2019 2:05 PM
Re: So, you think you're smarter than GM?
Phak1 09/19/2019 3:14 PM
Re: So, you think you're smarter than GM?
tclederman 09/19/2019 3:40 PM
Re: So, you think you're smarter than GM?
Phak1 09/19/2019 5:36 PM
Re: So, you think you're smarter than GM?
bartamos 09/19/2019 7:27 PM
Re: So, you think you're smarter than GM?
52Carl 09/19/2019 8:01 PM
Re: So, you think you're smarter than GM?
bartamos 09/19/2019 8:52 PM