Questions tagged [threading]

The art of creating and repairing threads on fasteners, and holes to take those fasteners.

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MIP threaded pipe in NPSM female threads

I'm installing a freestanding tub faucet. According to the manufacturer's spec sheet the supply lines have 1/2 inch female NPSM threads, which I believe is a straight thread. I'm trying to attach ...
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3 answers
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How can I mount a winch to a steel pole?

In order to raise -- and tighten -- a volleyball net every evening, we've attached a winch to one of the poles. The attachment is by two bolts going into the existing threaded holes in the pole. It ...
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2 votes
6 answers
299 views

How do I remove this wall anchor stuck in concrete wall?

Bought a TV recently. Tried to mount it onto our concrete block wall. Drilled. Hammered the M8 wall anchor bolt (with the nut on) too hard and it morphed the bolt. Struggled to unscrew the nut, ended ...
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Toughest self-tap screwable glue?

I have a self-tapping screw that has stripped through its plastic (I can't be more specific) housing. What's the toughest (as in resistant to stripping, it's not particularly load bearing) glue that I ...
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How can I connect a filter to my kitchen faucet?

I have a sink fixture in an apartment that I would like to connect to a filter. unscrewing the front of the fixture yields a hose terminating in a 3/8" diameter fitting. But it only has a TPI of ...
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Do I need to replace a brass T that points outward at 22d angle, not straight up?

Installed a 2.5g water heater expansion tank off of a existing 3/4 brass T on copper cold supply line on wall next to tank. Brass T does not point straight up but away from wall about 22 degrees. Used ...
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How do you identify a metric pipe thread?

I have a fitting that I think is a metric pipe thread. It is tapered. I have seen some charts on the web, but they are just for identifying parallel threads, not tapered threads. For example, these ...
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Is it normal for Teflon tape to discolor like this?

Today I was replacing a fitting on the house's water supply. I took off the PVC female adapter and the underneath looks to be Teflon tape that has discolored into black. I do not remember seeing this ...
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Remove and re-insert female threaded insert?

I have a metal rod with these threaded female connectors on each side. I'm hoping to cut the rod down a bit to shorten it but still keep the female connector on the side i cut. Is there a way to ...
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-1 votes
1 answer
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How to repair a sheared threaded hole for grub?

What would be a sufficiently robust way to rethread a hole for a grub which needs to be very tightly fastened? I have a tilt and slide patio door. The bottom fixtures are secured together by a dowel ...
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2 answers
157 views

Adapt 5/16-18 threaded rod to 3/8-24

I'm trying to mount a ham radio antenna that has a standard(?) 3/8-24 threaded post at the bottom to an existing 5/16" post (built in the past for a different antenna) with 5/16x18 threads. In ...
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What can I use to hold an iron rod Torchiere lamp section to the pre-wired lower iron rod threaded bolt that won't tighten securely?

I purchased a pre-wired Torchiere floor lamp that attaches together in sections of hollow iron rods that each have a smooth end and a threaded bolt on the other end. On one of the iron rods the thread ...
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How to choose drill bit for tapping a hole in metal - and what did I do wrong?

I need to drill a hole in metal for a 0-80 screw. So I bought a tap labeled 0-80. Then I looked at this chart: https://homerepairgeek.com/define/tap-drill-chart.html. I think it says to use a #50 ...
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1 answer
294 views

Faucet-mount filter thread/size incompatibility

I am trying to install a Culligan FM-25 filter onto a faucet, and it does not seem to fit. I am able to screw on the filter, but it is not secure, and water bubbles/sprays out the top. It appears that ...
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How to straigthen the twine curls/wraps [closed]

I have a thread cone like this which I need to load into net needle. The issue is after I have pulled some thread from the cone, the thread becomes too curly and tangled, it tries to wrap around it ...
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1 answer
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Slight plumbing leak in 1930s threaded pipes

I have a 1930s-era house with generally galvanized plumbing. The water-in line is a straight vertical pipe, except for this section which is perpendicular (and copper). The loop part is marked "...
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Removing/re-seating threaded rod for cabinet leg

I bought some cabinet legs along with 90 degree mounting plates from Ebay (I know, what was I expecting)... 2 of the legs are good, threads seated correctly, 1 is a little off but I can live with it; ...
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2 votes
2 answers
132 views

Use a tap on a die?

I bought some cheap and very cheese-grade metric taps and dies in a set. In short, they're about par for the source. Should a die fit over a tap of the same spec ? I guess they should not fit ...
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What are the exact measurements of this pipe thread?

I would like to 3D print something that fits into this threading: For that I would need the exact measurements of that thread, but without knowing what the standard is called it's hard to look them ...
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3 answers
224 views

Does unthreaded portion of bolts fit through hole?

I'm getting replacement for some M5 x 30mm hex bolts. The original ones are fully threaded, i.e. the whole shank length. The ones I can find have an unthreaded portion (i.e. grip) but their overall ...
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What is the significance that "no blade is involved" in threading pipe?

Lowe's (a big US chain home improvement store) offers black iron pipe cutting and threading services to customers. Basically they sell the pipe & will alter it for you. From their website in the "...
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Can I use a tap and die kit to change the thread pitch on an existing machine screw?

Can I use a tap and die set to change screw threads? I'm having difficulty finding the right size of screws for my project, and wish to manufacture my own. Can any type of screws / bolts be used with ...
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