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Old 10-11-2019, 07:56 PM
Aflyer111 Aflyer111 is offline
Join Date: Nov 2018
Location: Delavan, WI
Posts: 70
Default Bullet guide casting markings

Got some of my M1's today. When looking them over I noticed these cast markings in the bullet guide of one. It says S 66. Searched it up here but didn't see anything. Any idea of the meaning? Just mold #'s?

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Old 10-11-2019, 08:23 PM
budmant budmant is offline
Join Date: Oct 2009
Location: NJ
Posts: 1,642

Yep, just a forge number.
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Old 10-12-2019, 09:45 AM
Shomway Shomway is offline
Join Date: Apr 2012
Location: Michigan
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Often seen on WWII SA parts....triggers, bullet guides, follower arms.
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Old 10-12-2019, 06:35 PM
Aflyer111 Aflyer111 is offline
Join Date: Nov 2018
Location: Delavan, WI
Posts: 70

Thanks all, figured that was it but doesn't hurt to ask. Never really noticed before.
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Old 10-23-2019, 08:33 PM
tanker trash tanker trash is offline
Join Date: Dec 2009
Location: Burnet ,Texas
Posts: 324

OK, Manufacturing 101 lesson. "Tooling"

Most Garand parts were originally designed to be forgings which were final machined to their functional dimensions and shape. Some (Trigger Guard is best example) were later converted to stampings because of the savings in time and material to produce the part.
So a trigger starts as a blank piece of steel bar stock, made by a steel mill to the required alloy and strength requirements.
The blank piece is heated and placed between two die halves which are pressed together to form the basic shape of the part. It may take just one or several "hits" to form the blank. The blank part is sent on for machining. These die halves are made from very durable steel to resist the rubbing wear of forcing a steel blank to a shape. there were many die sets, not just one, in order to make the volume of parts needed to feed an army its rifles. Running around the clock.
If a die began to wear or had a problem, it would not make the blank piece correctly and cause subsequent production problems. Therefore each die set has numbers in the cavity to identify it. Dies causing problems can be pulled and serviced or replaced. And that's why forged parts have numbers in them.
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Old 10-24-2019, 08:12 AM
selworks selworks is offline
Join Date: Apr 2011
Posts: 63

Thanks for this very clear explanation.
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