unusual M1 parts and drawing numbers

A few examples of some parts that are not really rare but not often found.

note the revision 2 triggers

I believe the revision 2 bolt with the heat lot B1 is the first heat lot issued ?Attachment 58404Attachment 58405Attachment 58406Attachment 58407

I have never seen the triggers. I have a 2 SA B1 bolt on my 42 springfield

The revision 2 bolt heat lot B1 is from mid 1940, what month in 1942 is your M1 ?

I had the revision 2 bolt a while. It was on my 45 springfield but I replaced it when I restored the rifle. I used it on the 42 when I built it up from a receiver. The B.O.D. on the 42 is July.

Dom, here is some data from a few rifles from that period: s/n 772909 bolt revision 12 heat lot W9B, s/n 755630 bolt revision 12 heat lot W9B, s/n 856914 bolt revision 12 heat lot W9B

Mine is serial 714937 I had seen somewhere ( can't remember where) that bolts with heat lots of 12 SA RE5B and RE6B were proper also for this rifle's B.O.D. RCS Is it also true that the 2 SA B1 were common through out production, even post war?

All the revision 2 bolts had the hole through the right bolt lug as well as the revision 12 heat lot RE5B bolts - all bolts after that did not have the hole through the right bolt lug. My SA 613219 has a revision 12 bolt heat lot RE5B. I doubt that continued production of the revision 2 bolt heat lot B1 with the hole through the right bolt lug would have continued with all the revision 12 variations being produced

The bolts have always been a source of confusion at times for me. I know certain rifles depending on their dates of manufacture could have had a large range of different bolt heatlots could be proper for th them.

First rifle assembled with hole in the bolt lug was on April 29, 1940.

Now I'm guessing the hole was for lubricating the bolt internals?

The -12SA RE6B bolt can be found with the hole and without the hole.