Questions tagged [screws]

Questions relating to threaded fasteners and their use.

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1answer
60 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
32 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 ...
2
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2answers
68 views

What kind of screw is this?

While finishing the assembly of a basketball hoop from a kit, I ran into a case where the provided screws are too large in diameter to fit into the mating holes, let alone screw in all the way. I ...
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2answers
74 views

Can I use lag screws, lag bolts to hang swing vertically from a wood beam?

I need to hang a swing (picture attached) from a large wood beam in my living room. The beam is 1 foot high and 1/2 foot wide. (quite strong). I am planning to use 2 metal faceplates . Each ...
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3answers
84 views

Can screwing too far (about 1.5 inches) into a stud can weaken it?

I put up some IKEA cabinets (using their suspension rail). I used a 5mm (#10) x 50mm (2 inch). Minus the drywall and rail it probably went in about 35-40mm (1.5 inch) into the stud. After all was ...
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1answer
94 views

Is it normal for wood to sometimes squeal when screwing into it?

I recently put up some kitchen wall cabinets. When screwing in the cabinets one of the studs was more difficult to screw into. I pre-drilled pilot holes for the studs and everything went OK besides ...
2
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1answer
60 views

Stripped screw in door knob

I have a stripped screw in my door handle. I tried drilling it to hopefully get a better grip but ended up messing it up further. I believe that i have drilled deep enough to the point where the shank ...
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1answer
73 views

yellow zinc plated screw to subfloor and stud

Home is built in California late 1990s. I recently removed some nails and screwed subfloor on 2nd floor to joint/stud below using yellow zinc plated screws from HomeDepot. Now I realized it has notes ...
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1answer
66 views

What kind of screw is it this with two different intertwining threads?

I have a screw that is 1 1/2" long, and it has two different threads around it. It's a button head, made for a Phillips-head screwdriver. What do you call this kind of screw and its threading so I ...
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1answer
61 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 ...
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2answers
134 views

Used the wrong screws for sheetrock and screw marks are too visible. Any suggestions?

I used wrong screws for the drywall. I didn't realize that the screws are wrong until the job was done and I started to put mud on the walls. After putting the first layer and doing some sanding, I ...
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1answer
40 views

Removable Bracket for Wood

I am hoping to bracket two pieces of wood together at in a removable fashion (parts of a table that can be disassembled). Through research I found hanger bolts which look close to what I would want, ...
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2answers
90 views

What is this machine screw? 3.7mm OD, ~32 TPI

I have a machine screw from the hardware on an old desk that needs to be replaced (the knob it goes with is slightly stripped so it needs a longer screw to catch when mounted), but it's a really weird ...
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2answers
54 views

How can I hang artwork on a rented home's walls?

Hi, I am new to this part of America. I need to hang few pictures and few other very heavy paintings. I am in rented single family home. How should I go about doing this?
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0answers
25 views

Rusted tapcons on an aluminum screen patio cage

What replacement screw is best to replace rusted tapcons on an aluminum screen patio cage?
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1answer
292 views

How do I get a cam lock out of a really deep hole?

I bought a 54" desk from a local Walmart, more specifically a BH&G cube organizer desk. While I was putting it together and following the instructions, I realized that the cam locks weren't ...
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1answer
23 views

Remove broken setscrew in an already damaged hole?

Trying to remove a broken setscrew on part of my stove. Top photo is the current state, the second photo is another part showing an intact screw for comparison. I already tried to drill out the screw ...
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4answers
1k views

Plywood subfloor won't screw down in a trailer home

I'm remodeling my mom's bathroom and I'm putting 1/4 inch plywood down on top of the floor to get a smooth surface. The existing floor is strong but there was some deflection in it and it's not as ...
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2answers
146 views

Nylon switch cover plate screws

Every time someone touches any of my light switches they get a static shock. I know the root cause is the humidity is too low, but until I fix that, I heard that nylon cover plate screws (vs the usual ...
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3answers
45 views

Attach railing to aluminum post

I am putting in a handrail down the few steps into our garage. The floor is concrete, so I've ordered a couple of 3x3 aluminum posts. The railing has a single attachment point per post, and the ...
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0answers
28 views

Is there a torque table for hex cap screws?

I find that especially with smaller hex cap screws the hex drive is worn out or deformed long before I reach the maximum torque that the screw could theoretically handle. For example: I've used M5 ISO ...
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1answer
59 views

Do screwdrivers come in standard sizes?

I'm looking at getting a set of small Phillips head screw drivers for disassembling electronics, and I was wondering how the size of screwdrivers are measured? I know screws come in standard sizes (M1,...
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3answers
85 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
159 views

Lag bolts vs wood screws for reinforcing garage door header

I am about to install the garage door header bracket and I have almost everything figured out. There is a ~1 inch gap between the ceiling and joist I'm screwing into but I need every millimeter I can ...
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3answers
939 views

Screw Sizes for Electrical Connection box lids

Am having to install covers to several different types of electrical connections boxes in my house. Some are round, blue ones and some are a grayish tan with corners rounded. None of them have cover ...
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1answer
54 views

Door Jamb Rotted Where Latch Goes

I just installed a lock in my door and when attempting to install the latch I found that the wood was splintering and not stable, so I cut it out. My problem is similar to this one. What can be ...
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2answers
37 views

Solving subfloor squeaks

I am planning to remove carpet in a living room and dining room area of my house and replace it with floating laminate flooring. There are some spots in my current floor that squeak so I was planning ...
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1answer
70 views

Screws breaking through drywall paper

One of the several scenarios in which a screw doesn't form a nice and tight seal on drywall paper just below the surface is if a joist/stud is not in the same level as the adjacent two and there is a ...
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2answers
225 views

Would a M6 bolt fit in a 6mm hole?

I'm trying to look for some Allen screws for a friend to help him out, but am unable to figure out the correct size of the screws and nuts he lost (see image, marked in red).. I'm not really familiar ...
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1answer
52 views

I’m trying to replace my doorknobs

Help! I am trying to replace my lock with a new lock that I bought at bunnings and I’m here with my screwdriver but look at this what kind of screwdriver do I need for this! What is this. I’m very ...
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4answers
113 views

Installing pull-up bars. Will this design hold?

I am installing a series of pull-up bars all the way down my hallway, kind of like really spaced out monkey bars, and would like some advice on my proposed design, b/c I have zero experience with ...
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2answers
112 views

Broken screw head door hinge

My door is missing the strike plate and its keep opening up when there is a slight draft. So if I align the door it goes into the strike plate without any issues. I believe its a loose screw. So, I ...
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2answers
90 views

What type of unbrako screw is this?

I need some spare screws like the one in the picture, but I have no idea what it’s called. Any help is greatly appreciated!
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1answer
74 views

Dealing with squeaking screws in chipboard flooring?

I've had a problem with squeaking floor since moving in, and after pulling up the carpet and taking a look I've discovered it's down to the screws which have been put into the chip board flooring ...
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2answers
1k views

How do I better secure a loose lag shield in concrete?

I have a concrete hole that was drilled a little bit bigger and the lag shield anchor is a bit loose. How do you tighten it? Insert paper or wood?
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0answers
36 views

How many sizes larger do I need to go to fix a cross threaded screw?

Generally, how much bigger should a new screw be so that it doesn't interfere with the crossed threads that have already been made but sits as if it had been tapped freshly? People generally seem to ...
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1answer
58 views

What is this type of fixing? (similar to cam/dowel)

I know this is similar to cam or dowel type fixings, and I have searched extensively for this part, but does anyone know exactly what type this is? Specifically the silver section, as I have enough of ...
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10answers
6k 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 ...
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0answers
56 views

What is this part called?

I'm not sure this is the right place to be asking this but I'll give it a try. I have this bit of hardware from a pair of helping hands that I'd like to find more of. I'd describe it as a rod fastener ...
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3answers
284 views

What is this small triangle on this screw head?

This doesn't really relate to a problem I have (the screws work just fine), it's more of a curiosity question. Some of the screws I've used recently have a small triangle on their head, as if for ...
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309 views

Deck screw vs construction screw strength

I had sort of a follow up question that wasn't addressed here: Difference wood and deck screws Generally, does an exterior grade deck screw have the same strength as a construction screw?
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1answer
43 views

How far can you safely drill into 100mm thick brick for expansion plugs

I'm mounting a rafter support for a lean-to at the side of my house (45mm x 120mm wood beam). I know that the bricks are 100mm thick, so I'm wondering what length of expansion plugs (rawl plugs) I can ...
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0answers
17 views

Can I use a threaded insert on my screened porch so that i can assemble, take down, and reassemble plastic sheeting year after year?

I have made some heavy plastic panels to install over my screened porch during winter. Can I use inserts to attach and un attach these panels year after year?
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2answers
933 views

What kind of screw is this and how do I open it? [closed]

These are screws all over my pc casing. I would like to open them but I dont know how, sorry for the bad quality picture, but I cant take a better one. How do I open them? EDIT: As people have ...
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1answer
35 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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4answers
410 views

What's the best way to remove a rusty, broken screw from a tiled bathroom wall?

The previous inhabitant of our apartment used screws which aren't rust-free in the shower. Now the screw holding our shower head rail broke off - or rather, just "came off" without any resistance. ...
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3answers
74 views

What type of tool do I need for this screw with a pin in the slot?

What type of tool do I need for this screw holding my license plate?
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4answers
270 views

What screws to affix TV mount to wooden stud partition?

A 70" TV weighing 35kg is being mounted on stud partition wall using a fixed position TV mount which is 600mm wide. It will hit two studs approximately 230mm apart in the centre of the TV mount. While ...
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2answers
63 views

Lag screws can't enter lag shields

A few years ago I got 2 dozens of these to secure roof base plate on top of concrete column.. but after we put in the lag shields.. we couldn't insert the main screws so we didn't add the extra screws ...
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2answers
113 views

Strongest holding screws ever

The hole diameter is 8mm or 0.31" how long should be the screws inside the concrete wall with tux? and what has more break resistance, stainless steel or GI (Galvanized Iron)? Original message: What ...