Dick - Thanks for the buggered screw restoration hint.

Here are some Springfield Armory (Hill Shops) photographs from the early 1900s, showing work going on in the 'hardening room'.

Some of the photos appear to show 1903 Springfield bolts being processed for hardening. I don't know the order of the pictures, but, there are furnaces, vats for quenching, iron boxes for parts going into the furnaces, and wooden shipping boxes destined to go back to the Water Shops, (where the forged parts came from).

Quite the shop tour, if we can figure the sequence. There had to be a lot of continuity of methods from 'Trap-Door', to 'Krag', to '1903'. Beautiful Arms came out of dingy work places.

---