Questions tagged [screws]

Questions relating to threaded fasteners and their use.

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6
votes
4answers
61k 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:
1
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2answers
878 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 ...
0
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1answer
565 views

Need help installing the pull up bar i just bought

i am a rookie that hasnt done much installing/drilling etc. in my life (just turned 18 ;P). So i bought this pull up bar online, assembled it, but now i have to install it to my wall. At first i ...
0
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1answer
65 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 ...
0
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2answers
98 views

I need to screw into my wall but halfway in, it hits something hard

I tried in different spots on the wall but same thing. Is the whole wall like that? I live in a concrete building but not soundproof. I am able to use screws on other walls.
2
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2answers
76 views

Lag bolt vs structural screw (and length) for TV mount

I'm attaching a TV mount (1/8" thick slotted plate) to a wall that is 1" soft wood (redwood?) paneling over what I suspect are 3.5" redwood studs. The studs seem to be square. The mount takes five ...
1
vote
1answer
67 views

what is the opposite of a shoulder screw

A shoulder screw's unthreaded section has a bigger diameter than the threaded section. I'm looking for the "opposite" if you'll pardon the term. What is the name of the screw type where the ...
0
votes
1answer
97 views

What standard is this very coarse screw?

I was repairing Sony headphones when I saw some screws were missing. As all screws were the same, I took off a non missing screw to see what size and thread it was. I measured the outer diameter and ...
0
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1answer
87 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 ...
0
votes
2answers
8k views

How can I find a replacement screw/bolt?

I have a cast iron Christmas tree stand and I need to replace the screws/bolts. Where can I get them and/or how can I determine the thread so that I can check at a hardware store?
0
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2answers
44 views

What kind of screw for rawlplug uno?

I have this kind of anchors (plugs): rawlplug uno Despite googling hard, I couldn't understand what type of screws they should go with: wood screws? sheet metal screws? machine screws? coarse thread? ...
1
vote
3answers
103 views

Snapped off screw on sewer vent cover

The city recently told me I need a new cover for a sewer vent on the sidewalk. The cover looks like this: https://www.homedepot.com/p/NDS-4-88-in-x-4-88-in-Perforated-Sidewalk-Grate-BSB-CP-RTL/...
2
votes
1answer
52 views

How to fasten wet dog-ear pine pickets

I got some fence pickets for a small, outdoor project (a garden box, something like this). They are super wet (I literally get sprayed when cutting on a tablesaw!) and SUPER soft - with a little ...
2
votes
0answers
70 views

Do hinge screws become more tight-fitting over time once installed?

I've noted newly installed hinge screws can be replaced more easily if replacement is within days after fitting. If left for weeks or more, they become considerably harder to remove due to friction. ...
1
vote
1answer
49 views

Risk of overtorquing wood screws with T-handle screwdrivers?

The screws in question are 4.5 x 30mm A2 stainless steel hinge screws. As far as I can tell, they are good quality, branded (TIMco), double-countersunk, manufactured by thread rolling. Material is ...
-1
votes
4answers
182 views

What screwdriver should I use to remove drawer handles?

I'm changing the handles on my drawers, and I can't get the screws out. I think the screws might be a Phillips raised countersunk but I'm not sure. All I know is that it is a Phillips head screw. What ...
0
votes
1answer
82 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 ...
5
votes
8answers
19k 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 ...
0
votes
2answers
43 views

How to remove a rusty screw and cap from a toilet

The toilet seat has rusted away the screw holes that connects itself to the iron hinges, making the seat removable while the lid and the hinges stays connected to the toilet bowl. I want to remove the ...
15
votes
8answers
3k 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 ...
1
vote
1answer
38 views

Using Different Screw in Drywall Anchors

I have custom mounting hardware for a floating shelf I'm looking to install. This hardware came with its own special screws, which are meant to be screwed into wooden studs and support the mounting ...
0
votes
1answer
42 views

Screw Size for Bookcase

I have lost screws for a bookcase that looks like the IKEA Billy Bookcase? The hardware store and big box stores don't have anything like it and say the screw I have is foreign. I know it is 1.5" in ...
0
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2answers
77 views

In which direction do I unscrew this utility sink faucet to replace the washers?

This utility sink has a slow drip from the end of the spout. This should be easily fixed by replacing the rubber washers in the levers, however the phillips screws, shown further below, seem very ...
1
vote
1answer
357 views

Will this DeWalt #8 screw countersink bit be good for 1/16" aluminum?

I want to screw aluminum to wood. If it was wood to wood, this bit: Image from zoro.com makes perfect sense for the pilot and counter sink. However, it makes no mention of if the counter sink part ...
1
vote
4answers
1k views

What tool should I use to unscrew a hard-to-access hexagonal screw?

I recently bought a place which came with the appliances, one of them being a dishwasher. I'd like to extract the dishwasher from its compartment. From what it seems, the only thing preventing me to ...
0
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1answer
38 views

Galvanized steel hinge screws with stainless steel hinges: What is the risk of galvanic corrosion?

The screws in question are zinc-plated hardened steel screws (1 1/4 in) for use with heavy duty fire-rated stainless steel interior door hinges of unspecified grade. There is a theoretical risk of ...
0
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1answer
45 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 ...
1
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1answer
89 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 ...
1
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1answer
57 views

female thread repair: threaded inserts and hole-diameter required

I need to repair a stripped female thread in a piece of aluminum. Originally the thread was M7x1.0. I can enlarge the hole a little, but it's close to an edge, so not as much as might be needed. ...
0
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3answers
93 views

How to fix a wooden screw hole that is stripped?

I have an Ikea chest of drawers with metal rollers that allow me to slide the drawers in and out. One of the drawer’s metal roller screws has popped off due the weight of the contents of a shelf and ...
0
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3answers
61 views

GFCI conversion trouble: receptacle not screwing into outlet support plate

I'm trying to convert old "razor only" receptacles to GFCI protected ones in bathrooms. Since the old outlets are large 2-gang 4" boxes, I had to get GFCI conversion kits (manufacturer's specs) with a ...
1
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3answers
89 views

Is it a problem if a bookcase isn’t fully touching the floor?

IKEA assemblers have screwed a large bookcase (180cm height x 160cm width x 40cm depth) into my wall where the top is 10mm from the wall and the base is 17mm from from wall, meaning the bookcase doesn’...
2
votes
4answers
2k views

How to remove what I think is a screw head caught in a waste disposal

I have a waste disposal, and what looks like a screw head, which is jammed in the waste disposal unit (an Insinkerator 55 if it matters). This means as the machine is turned on, it makes a banging ...
1
vote
5answers
112 views

Hanging things on metal studs

My house has metal studs (South Florida) and I cannot figure out how to easily get screws into the studs for hanging things such as curtains. I have tried the pilot hole approach with a titanium drill ...
3
votes
3answers
3k views

rust-proof solution for attaching 2x4 to 4x4?

What screws can I use to securely attach a 2"x4" to a 4"x4" treated lumber? The solution would need to be rust-proof. I recently used a structure similar to the image below for a small fence, but ...
0
votes
2answers
83 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,...
0
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1answer
63 views

Can 3/8" Titen Heavy Duty Screw Anchor or hole be reused?

So we drilled into concrete to bolt down steel bases with several Titen 3/8" x 3" Titen heavy duty Screw Anchor. I'll be replacing the base, so I will need to remove the screw, remove the base, and ...
0
votes
1answer
166 views

Mounting an electrical box to screws drilled into the ceiling

A plastic box junction box shall be mounted to a drywall industrial ceiling with two screws. The box will be filled with many low voltage wires before it is brought to the worksite (making it very ...
0
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0answers
41 views

How to find a right screw for a hole

I want to hang some stuff on my wall so here it comes to the part where I need to get screws/anchors. Saying I have a hole in a piece that I would like to attach(a picture attached), how can I ...
0
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4answers
970 views

How can I anchor something in the gaps between the bricks or rocks of a fireplace without damaging the masonry?

I want to hang fireplace tools next to my fireplace without damaging the stone work. I don't want to drill into it. The stones have mortar between them with gaps about half an inch wide: I have ...
6
votes
6answers
3k views

What is the name of this Allen-head furniture fastener?

I have a couple of boards that are parts of a table I am assembling, and I wish to know the name of the metal piece of hardware circled in red, below. I would have thought it was called a bolt, but I ...
0
votes
2answers
97 views

Trying to remove a single handle shower faucet with stripped out set screw

I'm trying to remove a shower faucet handle, but the set screw seems to be stripped out. Honestly, it looks to me like there isn't much if any of the screw left for an extractor bit to grab hold of, ...
2
votes
1answer
68 views

Countersink for an M2 bolt

I need to make my bolts flush - they're M2 with nuts on the other side. The wood will have acrylic glued over the top so I need a flat surface. I'm confused about how to select an appropriate ...
0
votes
1answer
669 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 ...
0
votes
1answer
30 views

Plaster identification and screw recommendation

I need to fasten standard 15mm water pipes to a division wall in my house (built in UK in the 1970's). Some clips are already in place, but I need to add more (I am talking about clips like this: ...
4
votes
1answer
61 views

Attach wall “peg” with dowel screw

I'm building a cat climbing wall, and plan to have a series of large "pegs" as steps. My plan is to use 1-foot lengths of landscape timber (basically a 4" diameter log) and attach directly to the wall ...
0
votes
2answers
56 views

Hillman “Deck Plus” lag screws

I'm re-planking my deck and shoring up some of the substructure while I'm in there. The beams are side-mounted to the posts like this (from dca 6): This is obviously non-ideal, but is impractical to ...
10
votes
2answers
687 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 ...
20
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2answers
3k 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 ...
3
votes
3answers
339 views

Cutting a thread deeper in metal.

I am trying to put together a TV Stand with 3 legs- 2 of which are supported via 18 inch metal rods within plastic tubes, screwed into the base. The depth of the hole in one of these is too shallow ...