H & R trapdoor rifle

[Spokes]

Greetings!

I was wondering if anyone knows the size of the set screw in the trapdoor cam lock.

I always tighten the screw after each session but this time it was not there to tighten.

Thanks in advance.
.

[kenneth]

Numrich gun parts. H&R 1873. #1381381450 long, #1381440 short. $4.39 each. I would suggest you order several in case you lose another or at least order something else so the postage won't seem so ridicules.

[Tom Trevor]

Spokes, Set the cam on the shaft where it locks, mark the shaft then slide cam off the shaft file or grind a flat spot on the shaft then install the set screw with thread locker on it then place a second screw down on the first one. these are hex head Allen type and I have found there is room for the second one. This should cure the problem forever. Hope this helps.

[Spokes]

Tom,
I got ahold of some 4-40 x .125" set screws. They start but they won't thread in all the way and I don't want to force anything. What size are the screws that you are using?

Ken,
Thanks for the info but I would rather use a hex drive screw rather than the slotted versions shown on Numrich. BTW, How do I know if I need a long or a short screw just in case I have to use the Numrich screws,

Many thanks to both of you for the info.