Questions tagged [screws]

Questions relating to threaded fasteners and their use.

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84
votes
13answers
78k views

How to remove screws with stripped heads?

I have wood screws whose heads are stripped from trying to remove them with a drill. The drill (or screwdrivers) can't grip the heads anymore. What can i use to remove these screws easily?
78
votes
12answers
56k views

Is there a case where nails are better than screws, from an engineering/structural standpoint?

Is there a case where nails are better than screws, from a structural standpoint? For instance: Say you used screws instead of nails on a backyard deck, when the design specifically called for nails. ...
72
votes
7answers
478k views

Understanding US Screw Sizes

I'm going to be building a workbench, so I've been 'screw shopping.' I need some explanation on the sizing of screws when they are advertised as (example) 6 x 3/4". I know that 3/4" is the length of ...
55
votes
14answers
31k views

How to avoid stripping screw heads?

In at least two different contexts now (installing shower handrails, installing gate on fence) I've found myself stripping the head of the screw beyond all use. I must be doing something wrong, so ...
44
votes
7answers
35k views

Why are there so many different types of screws (phillps/flat/hex/star/etc)?

Newbie question. Why is it that there's a bazillion different types of screws? Why can't we just always use one standard screw type? Are there advantages/disadvantages to the different types? Are ...
34
votes
12answers
290k views

How much weight can screws in drywall hold?

I've always had the question of how much weight can a single screw into a drywall withstand? For instance, I would like to do things like this: It's hung with 5 screws. The whole thing weighs ...
30
votes
10answers
9k views

What is a NON-self-tapping screw? What does self-tapping mean, really?

Someone on the site suggested that I use "self-tapping screws", and gave me a link to the Wikipedia page about them. So, I went there, saw the definition: A self-tapping screw is a screw that can ...
30
votes
6answers
46k views

Should I use nails or screws for hanging drywall on the ceiling?

I'm replacing water-damaged drywall on my ceiling and was considering using screws. Other than cost, is there any other reason I should use nails instead? Or am I too paranoid that nails won't have ...
29
votes
12answers
714k views

How can I remove a really stuck screw?

I often come across screws that just won't budge with a manual screwdriver or even a driver bit in a drill. They are of different screw types and heads in a variety of different materials. What are ...
28
votes
7answers
118k views

How do I rehang a wooden door with worn screw holes?

I have a wood door in one of my rooms where the top screws no longer hold the hinge to the wall because the screw holes have worn loose. I have tried slightly larger screws and filling with wood ...
22
votes
6answers
21k views

What benefit do plasterboard/drywall screws have?

I have some plasterboard screws like this: However, without a drill I have a job getting them into the wall. Am I safe to use normal screws on hangings that aren't going to be taking a great deal of ...
21
votes
2answers
4k views

Will removing shelving screws from studs damage the studs?

We live in a newly built home. My husband hung some Ikea shoe bins on the wall and mounted them in to the studs. I am going to paint the hallway and would like to remove the bins and hooks, patch the ...
21
votes
4answers
8k views

What is the use for this different threading near the head of a large screw?

I'm inquiring about the strange threading at the base of this screw: These were used in somewhat heavy-duty outdoor construction. What is the purpose of that corkscrew, and is it safe to replace it ...
20
votes
7answers
92k views

How to unscrew screws that are barely accessible?

I need to remove the face of a fake drawer that is screwed from behind. Unfortunately, a kitchen sink is preventing me from using a screwdriver. There is approximatively 4cm of space. The screw head ...
19
votes
11answers
6k views

How to remove very stuck stripped screws?

These things are caught in hard wood. I made the dumb mistake of not drilling pilot holes. Rubber band trick failed Screw drill and removal bit failed JB welding a bolt worked for 2/5. Trying again, ...
18
votes
5answers
4k views

How to keep screws in a hollow door

I have a hollow core interior door. The screws for the handle keep pulling out. To fix this I've used the biggest screws that will fit. I've tried a couple of different types of glue, and I've tried ...
18
votes
6answers
9k views

How do I remove these Ikea screws? (studs inside holes)

I bought and assembled an Ikea sofa bed (asssembly instructions here). I'm moving soon and want to take apart the couch to make it easier to lift. Some of the screws needed for the assembly come in 2 ...
18
votes
6answers
29k views

Should I use nails or screws to refasten my subfloor to the joists?

My subfloor is squeaky, and there's a small window of opportunity I'll have to fasten it down before/during my carpet being replaced. I have available to me a nice corded drill, and an air-powered ...
18
votes
5answers
59k views

How to remove screws from old decking

I have some decking in my back garden and some of the planks need replacing. However, the screws are difficult to remove. Some have rusted/weakened sufficiently so that I've managed to remove the ...
17
votes
14answers
113k views

What is the best technique for using a drill to insert screws?

It looks so easy on the DIY programs, but I battle to insert screws using my drill. The screwdriver bit keeps slipping out, and it damages the screw head. Is there a neat trick for this? Should I ...
17
votes
4answers
4k views

Technique for driving hinge screws to minimize misalignment

When fitting hinge screws I've noticed that, unless the pilot holes are centered exactly on the holes in the hinge and at a precise (within 2-3 degrees) horizontal/lateral right angle to the hinge ...
15
votes
8answers
7k views

Wood glue versus epoxy for doweling stripped screw holes

I've come across two schools of thought for gluing dowels in place. PVA wood glue, such as Titebond. Two-part epoxy, such as Araldite. Bearing in mind long-term stability, which is preferable for ...
14
votes
10answers
13k views

How to fit a screw into a drilled big hole on wall?

I am fitting a window blind on a wall. The wall is made of plaster board as far as I have known. I have drilled a hole on wall bigger than the screw size. The drilled hole on the wall has a diameter ...
14
votes
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 ...
14
votes
2answers
5k views

What's the term for a hole with a screw thread?

I'm replicating a drawer handle that fits on an M4 screw. If you'd look inside the plastic hole, you can see a gold-colored metal tube that has screw threads. That's what the screw screws into. My ...
13
votes
5answers
9k views

Choosing the right machine screw for a threaded hole in a computer monitor mount

The SENSE M2488C computer monitor pictured here has 4 machine screw holes at standard spacing around the label on the back of the monitor. I plan to mount it from a ceiling mount, not on my desk. I ...
12
votes
4answers
6k views

What screwdriver I should use for this screw head?

I am trying to unscrew the screw head you see in the picture. It is from the kitchen faucet handle. From looking online, it is usually a hex screw head. I tried a hex-key wrench, it didn't work, and ...
12
votes
1answer
3k views

How do I unscrew these?

I'm a college kid trying to sneak my boyfriend in my dorm window. The first section is the holder on the window, the second part is the end of the slider on the window. All I have to do is disconnect ...
11
votes
7answers
2k views

What type of screws/anchors to fasten a closer to a steel door

What are some proper screws or anchors to use for affixing something to a steel walk-in door? The example for this question will be attaching an automatic closer to an exterior steel door. The door is ...
11
votes
3answers
14k views

What are the implications of driving a drywall screw too far into the sheet?

I'm not gonna lie. The early stages of my very first home improvement project completely smacks of novice DIY'er. I did so many things wrong that I've since learned from, but the first mistakes are ...
11
votes
2answers
8k views

Are these drywall screws properly driven/countersunk?

Related to this question. Even though I might be cluttering up SE with questions about driving drywall screws, I feel they will ultimately be helpful since I have been unsuccessful in finding images ...
10
votes
4answers
9k views

Finding the right size of nut for a bolt

I have a bolt with a thread pitch of .8mm and a diameter of 3.3mm. I am trying to find the correct size of nut for it, however the ISO thread chart says that a .8mm thread is M5, but should have a ...
10
votes
10answers
2k views

Rusted screws in outdoor outlet box

Summarize the problem I need help removing rusted screws from an outdoor outlet box. A few notes: The outlet box was used for an outdoor light that I removed I turned off the breaker I have access to ...
10
votes
4answers
3k views

What's this bolt head type and how can I open it?

There is a bolt screwed inside a long hole: I don't know the bolt head type. Is there a trick to open it?
10
votes
2answers
3k views

What is this screw called?

I need a screw for some outside door handles, and I cannot rethread the holes as some parts are brittle plastic and other parts are soft metal. I need an exact replacement for this screw, but I do ...
10
votes
5answers
79k views

How do you screw in double-ended screws?

I have a flat pack shelving unit to put together. It has double ended screws. According to the instructions you just screw them in using your hands. This is impossible: the pre-drilled holes seem way ...
10
votes
3answers
14k views

What can I use to lubricate screws?

I am re assembling a swing set made of pretty hard wood. My electric drill won't drive the screws in all the way and I have to try to use plain screwdriver. I don't want to strip the heads though. Is ...
10
votes
2answers
916 views

Identify this screw head (was: Security Torx)

Am attempting to open an old device cover (an adapter) and it has these screws (please see attached image, sorry for the bad quality, I couldn't get better focus than this.) Would really appreciate ...
9
votes
2answers
2k views

What do the numbers in screw sizes M3, M4 etc. mean?

I noticed that in some (many?) countries, screw sizes are listed as "M+number", e.g. M3, M4, M5 and so on. What does this size designation mean?
9
votes
7answers
66k views

Why does my drill bit destroy the screw head?

I have a craftsman drill which I use for drilling. When I use a screwdriver head to fix screws in drywall or wood, it keeps on destroying the head of the screw. So much so that the screw head is ...
9
votes
10answers
34k 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 ...
9
votes
4answers
19k views

I modified a nail-in electrical box to use screws instead of nails. Is there some code that prevents that?

Ever since I dove into the electrical side of things with my project, I've encountered a bunch of code restrictions. One thing that wouldn't surprise me if it was a violation of code is what I've ...
9
votes
4answers
9k views

How do I unscrew a hex screw that doesn't have any grip anymore? [duplicate]

I messed up the screw that fits this tip of this particular type of screwdriver bit (circled in red): That screw now has almost no edges and is basically oval. I tried lubricating the screw so that I ...
9
votes
2answers
2k views

How can I fasten a low-voltage plate to drywall?

I do not have much experience with home improvement related things. I moved into my first apartment and I saw that the internet coaxial cable was pushed inside the outlet. I loosened the screws and ...
9
votes
4answers
108k views

What type of screw is the most resistant to rust: galvanized, stainless steel, or deck screws?

How do the following screw types fare in an outdoor (wet) long-term application? Galvanized screw: Stainless steel screw: "Deck" screw:
9
votes
3answers
36k views

How can I choose the best lag screw / lag bolt?

I will be fastening Unistrut vertically along studs to facilitate garage storage, and want some guidance on choosing the "best" lag bolts to use. I want them large enough to handle hundreds of pounds ...
9
votes
3answers
3k views

How can I drive a screw with an impact drill?

I bought a Bosch PSB 650 RE Impact Drill and I have some question about how to use it for driving screws. I know it's not its primary function but for a few screws here and there it should work. I ...
8
votes
4answers
3k views

How do I use threaded inserts?

I got these fasteners with table legs that I bought for a formica table top. I get that I need to embed the outer part with the big thread into the table, and then use an Allen key to fasten the bolts ...
8
votes
3answers
4k views

How to combine flat and split lock washers on a bolt

So I'm assembling a pull up bar and its assmebly instructions look like this In the parts list it mentions only one type of spring washer (quantity 4). But it actually came with two types of ...
8
votes
4answers
12k 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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