TR Head Bolt Question

Nov. 18, 1941 - MB100001 thru Mar. 6, 1942 - MB125809 NO EBAY or COMMERCIAL SALES.
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Mark
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TR Head Bolt Question

Post by Mark » Mon Apr 09, 2018 6:47 am

It's my understanding that slat grills used TR marked head bolts. I have some original TR marked head bolts but also have some marked TR with a "M" above the TR. Are these M TR head bolts also original?
TR Bolt 1.jpg
TR Bolt 1.jpg (98.98 KiB) Viewed 409 times
I also notice that the M TR marked bolts have less threads on them.
TR Bolt 2.jpg
TR Bolt 2.jpg (107.24 KiB) Viewed 409 times
Thanks,

Mark

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DavidA
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Re: TR Head Bolt Question

Post by DavidA » Fri Apr 13, 2018 9:19 pm

There may have been some A/TR but typical was TR20. TR's were not there on any of my projects. The TR's may have been found on GP's if fine threaded.
David Aro - USN SEABEES '66-'70
1941 Ford GP-9244
1941 WILLYS MB-104354
1942 WILLYS MB-131350
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Mark
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Re: TR Head Bolt Question

Post by Mark » Mon Apr 16, 2018 9:28 pm

Sorry, my questions was regarding the engine head bolts and their markings. I have some original marked "TR" and some that have a "M" above the "TR". My question is are the "M TR" marked head bolts correct for an early MB?

I have not seen any engine head bolts marked "TR20". I am not saying they don't exist, I just haven't seen them.

Thanks

Ladislav
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Re: TR Head Bolt Question

Post by Ladislav » Wed Apr 25, 2018 2:04 am

From Willys MA only TR (not have seen M TR or TR20 on engine head bolts) marked bolts. The same TR marking only on 3/8" and 7/16" bolt heads (never have seen on any MA any original TR20 bolts in size 3/8" and 7/16".
But MA isn't Slat...

Lad.

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