Questions tagged [bolts]

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3 votes
2 answers
1k views

Remounting a pullup bar that is slightly off level

I mounted a Rogue P4 Pull up bar system on my wall. I used 6 x 1/2" x 4.5" inch lag screws to fix each post to the wall. I did my best to make each post leveled. However, in the end, one of ...
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0 votes
2 answers
103 views

Bolt keeps coming loose

I have an heavy duty office chair for my work-from-home (I am very obese). About every month, one of the bolts falls out of the arm. You can reattach it with a hex-head allen key, although it takes a ...
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  • 3
6 votes
6 answers
2k views

Does the outer diameter of 4.78 indicate an M4 or an M5 bolt?

I measured the maximal diameter of this counter-sunk bolt. And tried to match it with the metric bolt dimension chart: But I did not find any match. I find the difference between dimensions M,N and ...
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0 votes
3 answers
83 views

Pivoting with nuts, bolts, washers - is it possible?

Consider two stacked plates connected by some bolt, and the plates are supposed to be able to move independently. Usually in such cases they are connected by rivets, and cannot be disassembled easily. ...
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  • 103
14 votes
2 answers
2k views

How do I prevent the bolts in my snow blower rotor from breaking?

We got about 12" of snow today and my snow blower lasted only 30 minutes before shearing off one of the 1/4" bolts that holds the rotary blade in place. This is the second time this has ...
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  • 243
0 votes
0 answers
44 views

Helicoil, epoxy or some other method to repair threads for swimming pool pump?

Jandy swimming pool pump's plastic backplate comes with what appears to be two metal threads to attach diffuser. In my case threads rusted and diffuser came loose. Instead of buying a new backplate I ...
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3 votes
3 answers
536 views

Do carriage bolts hold their position in soft wood?

I have a question about carriage bolts, and when they are appropriate to use, instead of more traditional hex head bolts. If I understand correctly, their main advantage is that they can be tightened ...
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  • 162
0 votes
0 answers
30 views

What size nut for a B7 1-1/8" threaded rod?

I have a threaded Rod B7 Alloy Steel 1-1/8-7. What size nut will fit this? I got some nuts size being 1-1/8"-7 but they don't fit.
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5 votes
6 answers
181 views

Elegant way to jack two materials apart, applying spreading pressure to pin them in place?

I have a tall cabinet acting as a room divider. Since it's not against a wall, it could fall. Screwing into the floor or the wall is not feasible, but the top of the cabinet is 5 inches from a ...
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  • 215
3 votes
4 answers
960 views

Fixing sheet material together

I have two pieces of sheet material that I want to fix together, one is reinforced cardboard and the other is a flat piece of metal that's part of a clasp. I'm looking for a fixing that would function ...
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  • 177
0 votes
2 answers
122 views

Metric bolt specification

I am working on a project that requires: 3pcs M5x30-50 bolts and nuts I assume the M5-30 is the size and length. What is the 50 specify?
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1 vote
3 answers
197 views

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
262 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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  • 21
0 votes
1 answer
80 views

Broken 5/16 x 2 1/2 lag screw in beam

I was trying to hang a weight storage unit in my garage and the lag screw snapped, leaving 1/8 of an inch of the screw exposed from the wall. I'm not sure if I should use an extractor tool or another ...
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  • 11
0 votes
0 answers
56 views

Stringer - Running 2x4s on top of the dry wall connected to the wall studs behind

I need to mount two vertical strips (blue color in the picture below ) which will hold shelves that can support roughly 400lbs of weight in total. I want to mount this in the center position of the ...
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  • 101
0 votes
2 answers
87 views

Picnic bench unstable

My old picnic is unstable, especially when people are sitting on it. I think it moves because the holes that the carriage bolts go through have expanded so there is some wiggle room for the bolts (...
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  • 245
3 votes
7 answers
2k views

Connect 3/8-16 bolts at 90 degrees

I'm finding that I am needing to connect two standard 3/8-16 (coarse) bolts at a 90 degree angle for mounting, like an elbow fitting would do. I need to be able to thread them in individually, because ...
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1 vote
4 answers
218 views

Is a spade bit the right tool for burying a 3/8″ bolt in plywood?

Suddenly the two hardware stores near me have all sorts of varieties of spade bit sets from multiple manufacturers displayed in prominent aisles, which makes me wonder whether that's the reason I am ...
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  • 465
0 votes
1 answer
126 views

Which nut and bolt to attach wood to metal?

I need to attach a "plank of wood" to a metal bar, shown as the two bolts C in the figure below. This problem arises while designing a proper way for hanging a chin-up bar. Notice in ...
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  • 465
2 votes
2 answers
204 views

Should I use lag screws or expansion bolts for an aerial mount point on a joist?

I would like to install a mount point on the ceiling for my wife so that she can continue doing aerial work. This is the mount point I want to install: Aerials USA Stainless Steel Mount Point As you ...
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  • 29
23 votes
6 answers
4k views

What is the right tool for old, rusty, flat cross head bolts?

I'm trying to restore an old park bench, and I am struggling to unscrew the bolts. The heads have this wide (~12-14 mm) "flat cross" pattern that I have never seen before (see photo), and I ...
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0 votes
2 answers
152 views

mantel mount with only 2 studs available

I bought a new home where the TV was mounted directly above the fireplace. The gap between the TV and fireplace was a scant 3 inches. I've since raised the TV to the specs provided by the fireplace ...
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  • 1
17 votes
13 answers
4k views

How can I get a bolt with no head out of my wall?

I tried to screw this bolt into a stud to secure a 2x4. The hex head snapped off, and now the bolt is stuck. I managed to slide off the 2x4, but I have no idea how to extract the bolt. IIRC it's a 6&...
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  • 285
1 vote
3 answers
388 views

How much weight is safe to hang from a 1/2 inch thick maple board mounted to the wall?

I have a wall mounted metal barbell holder that holds up to three barbells. The holder has pre-drilled holes 10 inches apart (two on each end). To mount this to a wall, I will have to attach a ...
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  • 41
3 votes
2 answers
401 views

Rust free concrete fasteners

I need to fasten a 3/4 inch PVC trim board to a poured concrete basement wall. Since this will be on the exterior of the house I want to avoid rusting of the fastener. The previous pressure treated ...
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  • 86
6 votes
3 answers
613 views

Best Practices for Measuring Screw/Bolt TPI?

It is extremely nice to be able to use a caliper to measure screw/bolt major diameter (and length) to find correct replacements. However I am struggling to come up with a good way to determine ...
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0 votes
2 answers
759 views

What glue & screw/bolt/nut to use to fix the bathtub drain overflow?

I was cleaning the bath tub and I had unscrew a cap from the side of bath tub (where the hole is located) below: The cap consists of 2 parts:Part A & B as below When I removed part B, there was ...
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  • 243
0 votes
1 answer
745 views

Trying to find correct bolt for ceiling fan electrical box

I'm really struggling trying to find the correct bolt for this electrical box for a ceiling fan. After taking the old ceiling fan out, I found 2 mismatched bolts that the previous person had used. One ...
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1 vote
1 answer
104 views

What type of screw/bolt has expandable wings behind the wall surface?

Do you know what type of screw and bolt this is? Do you know the best way to unscrew it? It attaches my CCTV camera to the ceiling plaster (dry wall).
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  • 129
1 vote
2 answers
215 views

Which side are these washers supposed to go?

I’m trying to assemble this trolly and the instructions are blatantly useless. Attempting to check it from the box picture, I was convinced that the washer goes on the nut side, but as I tried fitting ...
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  • 163
0 votes
2 answers
77 views

Drip leak from a 2 yr old toilet / bolt

I had my toilet replaced about 2 yrs back with a Kohler 4467. It seems to have developed a drip leak from where it is bolted - a drop or 2 every 30min. I had the plumber who installed it come and look ...
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5 votes
2 answers
614 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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2 votes
2 answers
912 views

Allen key bolts vs Phillips head make a difference?

I received a metal bed frame without the bolts. The directions have the sizes used in hardware list. I went to hardware store but they didn’t have M6 bolts with hex head as shown. The sales associate ...
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1 vote
2 answers
1k views

Top Fixing Toilet Seat Bolt won’t unscrew [closed]

Any ideas for getting this guy on the left out? When I unscrew it I just hear a squeaking sound. Guessing that the nut has rusted onto the bolt and the whole plastic assembly is turning. Thanks
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  • 111
8 votes
3 answers
699 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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1 vote
1 answer
118 views

How do I fix this poorly designed double-rod towel rack?

Original question: How do I name/ describe this bolt so that I can search for and purchase it? I have a troublesome towel rack that I’ve been fighting with, off and on, for several years. After much ...
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1 vote
1 answer
179 views

Can I use a different type of bolt for awning?

I got a light plastic awning from amazon. It only has 3.4 pounds. The size are 30"x40". Now I want to install it over the front door. The package comes out a set of bolts(The size is marked ...
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  • 113
0 votes
3 answers
109 views

unscrew a rounded nut

I tried to remove the supporting wheel of my son's bike the other day, it's quite easy to remove one but the other gave me quite a bit trouble - the nut is rounded thus can't be secured by a wrench. ...
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  • 283
9 votes
3 answers
5k views

How to prevent bolts from rusting and sticking in the toilet tank?

Inspired by this problem. If I somehow succeed in removing the rusted bolts and replace them with new ones, how can I prevent the new bolts from rusting and getting stuck too? (Other than removing ...
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  • 265
1 vote
5 answers
11k views

Removing rusted screw and wingnuts from toilet tank

My toilet tank is held in place by two screws, which have rusted so much that the shape in their head is almost completely disappeared. On the opposite side, they are held in place by two wingnuts ...
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  • 265
4 votes
5 answers
3k views

How to bolt something to a wood member when can't access the back side and a carriage bolt won't do

I need to bolt a solar inverter to a stud wall for three reasons. it needs to be a few inches offset from the studs, so the bolt holes in the inverter won't line up with the studs, I'd feel better if ...
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-2 votes
1 answer
95 views

What would the size of this nut be? [duplicate]

I have this nut that is attached to my bed. However, I don't have access to the bed and hence need to guess the size of this nut so that I can buy the tools for it. Anyone know roughly how big this ...
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10 votes
2 answers
13k views

How do I remove this bolt from my bedframe?

This is my first time posting in this forum but I wanted to get some help from y'all regarding removing a bolt from my bed frame. I bought a used bed frame and I need to dismantle it to shift it into ...
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0 votes
2 answers
769 views

Sourcing a spacer / rectangular washer to prevent rotation of a carriage bolt in a round hole?

While installing a Curt trailer hitch, I lost one of the provided carriage bolts and what they call a spacer inside a frame tube. After lots of time spent trying to retrieve the bolt, I've decided to ...
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2 votes
3 answers
1k 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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  • 163
1 vote
1 answer
407 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,...
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1 vote
3 answers
549 views

Can I use toggle bolts to install faux wood beams to the drywall in the ceiling?

Unfortunately the ceiling ceiling joists run in the wrong direction. I was wondering if I can use toggle bolts to support ~50 pounds of faux wood beams on ceiling dry wall. It would be about 4 toggle ...
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0 votes
2 answers
718 views

How to mount header bracket for garage door opener to concrete wall?

The anchor of the header bracket securing the garage door opener's rail to the concrete wall above the garage door came loose over time and with vibrations (details in a previous question). What is ...
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  • 241
1 vote
3 answers
580 views

What kind of bolt is this? (securing the garage door opener rail to the wall face)

It was used to secure the wall mounting bracket of the garage door opener's tee rail to the concrete wall of the house above the center of the garage door opening. The bolt was inside an expanding ...
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  • 241
0 votes
3 answers
210 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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  • 101