Is there more than one 8-32?

[blackjack]

My rod tip takes an 8-32 jag, worm, scraper, etc.  So I ordered an 8-32 .50 cal jag from TOW.  It is too small.  The threads don't bite.  Any thoughts on what might be going on here?

[Pete G.]

Since the jags are only available in 8-32 and 10-32, I would guess that your rod tip is really 10-32.

[flehto]

What about the other end?....Fred

[Acer Saccharum]

Screw Check'r. It's got tapped holes to check your screws in fine and coarse threads, gives you the tap drill size and body size . Hard, so you can run a screw thru the plate, then cut it off, file the end flush with the plate, and back the screw out to restore the threads. Darn handiest tool going.

Brookstone sold these once upon a time:

[smylee grouch]

Just about every big box hardware/tool store has them (screw checker) and alot have them in metric too. I agree, dam handy, and I use my several alot.

[T*O*F]

Brookstone sold these once upon a time:

Thanks for the info.  Brownells has them.  Just ordered one.

[Bob Roller]

Just about every big box hardware/tool store has them (screw checker) and alot have them in metric too. I agree, dam handy, and I use my several alot.

Smylee,
It depends on what prison in China the screws are made in. A 4mm is very close to our #8 but the pitch is different. I make my own thread check plates and have some odd ones.I gave Taylor a 1/4x80 and have a 6 flute 5/8x32 and a 1/2x16 die that I use to make lead screws for a 6 inch Atlas lathe I made into a crew machine over 40 years ago.

Bob Roller

[D. Taylor Sapergia]

Bob:  I used that tap and die (1/4" x 80 tpi) to make the diopter sight for my last pistol grip Hawken.  Cutting threads that fine is an interesting project.  My thanks again for your benevolence.

[P.W.Berkuta]

My rod tip takes an 8-32 jag, worm, scraper, etc.  So I ordered an 8-32 .50 cal jag from TOW.  It is too small.  The threads don't bite.  Any thoughts on what might be going on here?

The ram rod is a 10-32 female thread that is why your 8-32 jag is loose. Black powder cleaning accessories are 10-32 & modern firearm cleaning accessories are 8-32 (NORMALLY) .

 I have seen this mix-up in the aero-space industry more that once by experienced mechanics. They grab a 8-32 screw and screw it into a 10-32 threaded hole and wonder why it does not torque up same with a 6-32 in a 8-32 threaded hole . All boils down to not paying attention to the paperwork/detials .

[Mark Elliott]

Screw Check'r. It's got tapped holes to check your screws in fine and coarse threads, gives you the tap drill size and body size . Hard, so you can run a screw thru the plate, then cut it off, file the end flush with the plate, and back the screw out to restore the threads. Darn handiest tool going.

Brookstone sold these once upon a time:

Tom,

Do you mean that the Screw Check'r plate is hardened so that the saw blade won't cut it?   If so,  that would be a handy thing to have.   I just have a plastic one I picked up at Lowes.   

[Bob Roller]

Bob:  I used that tap and die (1/4" x 80 tpi) to make the diopter sight for my last pistol grip Hawken.  Cutting threads that fine is an interesting project.  My thanks again for your benevolence.

Taylor,
You're welcome.Every so often I divest myself of odd things that have been laying around too long.
Last week I sent two carbon steel taps and a die 10x32 to Rolf in Norway and he got them today.
That 1/4x80 tap and die were given to me by a friend who passed away 4 years ago,Bob Wyant
who with my help made up a Billinghurst bullet gun and those two items were for a sight for that
rifle but was never used. You are the only one that has ever got any use from it.

Bob Roller