Questions tagged [screws]

Questions relating to threaded fasteners and their use.

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1answer
789 views

Need help installing the pull up bar i just bought

I am a rookie that hasn't done much installing/drilling etc. in my life (I just turned 18 ;P). I bought this pull up bar online, assembled it, but now I have to install it on my wall. At first I ...
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2answers
2k views

How to deal with Square Drive vs. Robertson Screws?

Although the terms "square drive" and "Robertson" are often treated as the same in catalogs, the difference (as I understand it) is that Robertson tools and screws have a slight taper to the square ...
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2answers
393 views

What type of bolt is only threaded at the tip

I am trying to fix my son's scooter and need a 2nd one of these: I've never seen this style of bolt/screw before: only the first 1/4" or so is actually threaded and the rest is just an ...
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1answer
197 views

Are phosphate floor screws suitable for subfloor which will be covered in thinset and cement board?

I am installing hardiebacker concrete board with thinset to a plywood subfloor. I am putting down the new subfloor and want to be sure the screws that I use to secure the plywood to the joists will ...
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2answers
42 views

What are some effective methods to fix a worn out screw holes of a door hinge? [duplicate]

I have a door that was slightly tilted and didnt close properly. I noticed the hinge was a tad loose, and what was holding it was a short 0.5" screw. I replaced it the screws with a new 1" ...
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1answer
115 views

7 inches long 4-40 screw

I have been looking all over to find 7 inch long 4- 40 screws. I found McMaster carries threaded 4-40 rods that are 8 inches long but these are not screws. I know they do exist as I found one just ...
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1answer
75 views

How do I repair decking where my screws have broken?

We installed a deck (various 2x and 4x PT lumber with 5/4 PT decking) two summers ago. As the wood dried, it warped and shrunk, so the deck's been squeaking with every step. I just took an hour or so ...
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2answers
75 views

What type of screw do I need for this faucet handle?

Somehow the screw holding the handle of my outdoor faucet - the type you connect a garden hose to- came loose, and my faucet handle detached from the stem of the faucet. Normally this is the type of ...
8
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3answers
655 views

Are electrical screws a standard diameter?

I've just had to reset the thermal cutout of my immersion heater. Whilst removing the cover, I've stupidly dropped the nut somewhere behind the tank. Fishing around with a magnet has pulled up all ...
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1answer
63 views

Why don't my composite deck screws go in all the way? Why RT screws?

I'm trying to finish up a composite deck project. We had been using SplitStop screws when we needed them, but I only need about 30 more and don't want to buy another box of them because they're very ...
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0answers
22 views

What length and gauge screw to attach a 2x4 fence rail to a 4x4 post (face screwed)?

I'm constructing a picket fence and need to attach the 2x4 rails to the 4x4 posts. I've seen some conflicting information of what length and gauge. I'm leaning towards 3" #9 screws. This will ...
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1answer
144 views

What are these “split thread” screws for?

I've found a screw like this. It doesn't have a whole thread, it's threaded both near the tip and near the head but not in the middle. What's the purpose of this? Furthermore the thread is partially ...
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1answer
35 views

What are these brass spacers on a simple porcelain drawer pull called?

I have a few of these vintage, small, round porcelain drawer pulls; see pics below. Some have screws and “spacers” but some don’t. So I’m trying to figure out what those brass “spacers” might ...
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3answers
75 views

How do I measure my screws to match how stores label them?

When I buy screws, the container often has measurement labels, e.g. : 50/4 or 20/2.5 and such. I'm pretty sure the first number is a length in millimeters, and the second number is a width in ...
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3answers
238 views

How to unscrew this screw

I want to take out my dish washer but there is a screw that I don't know how to unscrew. I can't get the screwdriver straight on the screw head, only at an angle. Any advise would be appreciated.
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9answers
27k views

Why can't I drive this Tapcon into concrete?

I'm trying to drive a 2 1/2" long 3/16" diameter tapcon into a 50 year-old concrete slab/subfloor to attach a new toilet flange. The instructions on the case of Tapcons said to drill a hole in the ...
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4answers
10k views

Dewalt DCS391 - Can't change blade on circular saw because of stuck blade clamping screw

I need to change the blade on my Dewalt DCS391 circular saw for the first time. The blade clamping screw is for an hex key left-hand threads, but I can't unfreeze it no matter how much lever of ...
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1answer
48 views

Weird set screw on tub faucet

I’m trying to remove this old tub faucet. There is what looks to be a set screw, but it’s either been stripped or is super corroded. What are my options here? I can’t seem to fit an Allen key down ...
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1answer
230 views

size of screw, wall plug and drill bit for shelf upright with 7mm hole

I have a shelf upright that has 7mm sunken holes, like this one here: https://www.twinslotshelving.co.uk/shelving-uprights/1m-white-upright I'm just unsure about the size of the things I need for ...
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2answers
51 views

Butt joints with screws

I'm building a small wooden foundation for a new shed (pic below, joints in question highlighted). I'll be using wood screws to put it all together. My question is simple, should I be screwing through ...
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2answers
72 views

Where can I find furniture screws that lock into embedded metal parts?

I'm renovating an old box for the MRS. as a bit of a project. It's missing some parts which appear to be the type of screws you get in "flat pack" furniture whereby you screw so much into ...
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4answers
11k views

Can I wall-mount a TV when there is an air gap between the drywall and the wooden stud?

I'm mounting a 38lb TV (with a ~10lb mounting bracket). I located a stud, but the drywall floats an inch above it, plus the drywall itself is another 1/2 inch. So a couple 3-inch screws (and not a ...
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0answers
20 views

studfinder’s ac setting is going off AFTER placing screws

I have a precise question about what my walls are getting up to, and reading the experiences of others hasn’t helped much. I have a vivreal studfinder that includes metal and ac sensors, and plaster ...
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2answers
171 views

Looking for drill bit tapered to match pencil sharpener

I saw this once years ago, but can't find it now. It's a drill bit that drills a conical hole whose taper matches the cone left by a pencil sharpener. The idea is that you can repair stripped screw ...
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2answers
105 views

What is the best way to remove a broken screw from a deck board?

I used stainless steel trim screws (3 in x 9 gauge) to rebuild our deck and one of them broke off when I was drilling it in. There was about a 1/4 of an inch left (just the shank, no head) but when I ...
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1answer
75 views

Using chipboard screws and plugs in a dot & dab wall

I have a dot & dab wall and am installing a radiator onto it. I had a rummage around and found a "chipboard screws and plug" set. Using the included wall plugs, would these be suitable for ...
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3answers
207 views

Trying to replace the adjuster screw on a screen door — low-profile threaded screw insert and bolt (identification needed)

On my sliding patio screen door there is an height adjuster held in place by flat-profile screw inserts. I'd like to obtain more of these threaded bolts and inserts, but I have a nomenclature issue ...
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1answer
159 views

Hold a nut while unscrewing?

Im trying to take apart a metal desk, but Im stuck on one part. Theres one spot where the screw is visible, but the nut isn't accessible, so when I turn it, it just turns both. Ive tried moving other ...
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2answers
4k views

Screw with two grooves?

Hi there: this screw from my bathroom vanity handle has broken. I'm curious about the two grooves that you might be able to see on the remaining screw. Do they serve any purpose? Should I be trying to ...
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1answer
27 views

How to remove inaccessible screws from window handle?

My window handles are defunct. The locking cylinder is missing from one, and the cylinder is loose and falls out of the one pictured. They are both locked shut permanently. Two screws hold it in place,...
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0answers
42 views

How much weight can a 3.5" deck screw hold before pulling out?

I have built a climbing wall in my daughter's bedroom room. There is a portion on the structure that is completely horizontal on the ceiling, it is 36" × 36". The framing consists of 2x4's. I ...
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2answers
99 views

Uneven poles for fence with wood railing?

What can I do if the steel poles used for a fence are uneven? They're all supposed to be the same height, but for some reason, they're uneven (ie. surface is uneven, the welder din't measure correctly,...
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1answer
18 views

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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2answers
51 views

Removing rusted screws from a gate-post attached to a wall

I am changing my old rusted garden gate with a new one. However, because of a couple of rusted screws, I could not remove the gate-post attached to the walls on either end of the old gate. I tried ...
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1answer
42 views

Concrete screws not going in all the way [duplicate]

I'm attempting to use tapcon 1/4in by 2.75in concrete screws to affix something to a wall of poured concrete, but it's only going about 3/5 of the way in before refusing to go any further. I used the ...
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1answer
238 views

Which mounting screws to use for Ikea Hoppvals?

I recently bought these Ikea blinds (HOPPVALS). To my surprise when I opened the package there was no mounting screws to use or any recommendation of what kind of screws would be the appropriate ones ...
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9answers
31k views

Do I run screws through the “tops” or through the “bottoms” of the corrugated steel in roofing?

Suppose I want to cover a roof with corrugated steel sheets. Imagine a sheet laying on the roof. It will have "tops" - zones that are further from the roof surface and "bottoms" - zones that are ...
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6answers
10k views

How can I use toggle bolts with limited depth behind them?

I have a predicament, I am putting up a shelf into the wall. The wall is plaster, and then hollow and then concrete. I have screws with toggle bolts on them. The 2 inch screw with the toggle bolt ...
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3answers
118 views

How much weight can a 3/4“ x 8” lag bolt hold when drilled in half way?

Question: How much weight can a 3/4" x 8" lag bolt hold when drilled in half way? What about other lengths and thickness, and percent drilled in? Is there some sort of formula to calculate? Optional ...
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4answers
765 views

What imperial machine screw has a diameter of 4.5mm and a thread pitch of ~1mm?

I lost one of the screws of my grandpa's rocking chair. I live in Germany and cannot figure out which kind of nefarious imperial screw this is. According to my measurements, the diameter is exactly 4....
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1answer
1k views

Light Fixture Screws & Bracket Too Small for Fixture Box

I have a light fixture that came with a mounting bracket and some screws. When I went to screw the bracket into the ceiling fixture box, it looks like the box's holes are too big. Not only do the ...
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2answers
55 views

Remove screwdriver tip from screw hole

Gonna be a weird one. I've tried to open up a Neato Robot Vacuum to fix a small problem and I've found myself in a doozy. Trying to unscrew it, the tip of the screwdriver must have been loose and fell ...
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2answers
2k views

how to fasten shelf bracket?

How do I fasten a shelf bracket correctly? I think I'll need to drive the two upper screws in at an angle? This is a typical bracket with three screw holes: one at the bottom and two on the top. The ...
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2answers
6k views

How to stabilize a crack in wood?

I am working on my first wood product. I am completely new to this. The following happened: My question is: How do I stabilize this crack? Can I fill something into the hole so that the crack doesn'...
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1answer
40 views

How can I hang a shelf off of existing screws in brick wall?

Recently moved into an apartment, and setting it up. I need to hang a projector and a video game console off of a brick wall in the home. Ideally, because it's an apartment, I don't alter the wall. ...
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4answers
2k views

How to fix an electrical outlet where the threaded mounting hole is stripped?

The threaded mounting hole in my electrical outlet is stripped; please refer to where the top flat-head screw is in the photo. As a result, the electrical outlet is not physically stable. How should ...
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1answer
65 views

Identify this Screw

What is the name/type of this screw? This screw is used in this manual for assembly of my chest drawer. Here is an excerpt from my assembly manual. Its usage is marked with "F".
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1answer
43 views

Stuck/Spinning Bolt Screw

Some time ago I had a handyman install a pull-up bar with some "M10 x 75" bolt screws that came included with the pull-up bar. When I try to take the bolt screw off to remove the pull-up bar, the ...
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2answers
80 views

Stuck keyed drill chuck

I have an older Black and Decker KR650RE reversible hammer drill. I need to replace the chuck however the screw on the inside seems damaged. How can I remove the chuck. Any help much appreciated. ...
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1answer
860 views

Hanging faux wood blinds- screw broken. Is there a tough screw I can use for a wall stud?

Job= I was trying to hang up some new faux wood 2" slat blinds. It's a double sized window, so I bought 2 blinds. I needed to install 4 brackets, with 2 in the center. I predrilled the holes as the ...

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