52 Ford
Stainless
- Joined
- May 20, 2021
So, I found an old 1/4" NPT tap in a toolbox. Most of the tools in the box were from around 1900. Some of the tools had patent dates from much earlier, so I think 1900 is a good guess.
It IS 1/4" NPT. I used it to tap some holes in plastic and the threads were actually a really good fit. But, again, that's plastic.
What I'm wondering, is what TYPE of tap this is. I has a rectangular "tang" instead of the square drive that most taps have.
Seems like some sort of "repairman's tap" or something like that. Perhaps mean't to be driven with an adjustable wrench or pliers? Maybe to chase/clean threads?
If you look at the second picture, you can see where it's stamped "1/4". Sorry the picture is blurry. Bad lighting, so the exposure was a bit long.
There's a LOT of thread length there.
Sorry I forgot to add something for scale. I'll add a picture with some tape measures or maybe some steel rules (if I feel like getting fancy ) in it tomorrow.
To get a production 1/4" pipe nipple to fit the hole, I tapped a little under 3/4 of the length of the tap.
Sent using Morse code on - .- .--. .- - .- .-.. -.-
It IS 1/4" NPT. I used it to tap some holes in plastic and the threads were actually a really good fit. But, again, that's plastic.
What I'm wondering, is what TYPE of tap this is. I has a rectangular "tang" instead of the square drive that most taps have.
Seems like some sort of "repairman's tap" or something like that. Perhaps mean't to be driven with an adjustable wrench or pliers? Maybe to chase/clean threads?
If you look at the second picture, you can see where it's stamped "1/4". Sorry the picture is blurry. Bad lighting, so the exposure was a bit long.
There's a LOT of thread length there.
Sorry I forgot to add something for scale. I'll add a picture with some tape measures or maybe some steel rules (if I feel like getting fancy ) in it tomorrow.
To get a production 1/4" pipe nipple to fit the hole, I tapped a little under 3/4 of the length of the tap.
Sent using Morse code on - .- .--. .- - .- .-.. -.-