I decided to seriously clean my 442. I removed the grips, side panel, mainspring, hammer, etc. At one point I noticed a silver pin laying on my bench. The pin is 0.124 inch dia by 0.441 inch long. I can't see where it goes. I found an exploded diagram (no parts list, just diagram) on Brownells site. I can't see where this pin goes on that diagram. Any ideas?

Never mind. I have after market wood grips. It fits them. Sorry for being dense.

Just make sure it isn't your firing pin retaining pin.

Hapworth, thanks for that. I was very careful to set the firing pin retaining pin with the firing pin and spring. The grip pins are about 4X larger than the firing pin retaining pin. It is all back together, an dry fires as it should.