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7
votes
5answers
6k views

What is this kind of security bolt head called, and how can I remove it?

A previous owner fitted the light fitting pictured above, and has not left me a tool to remove the bolt. The bulb has blown so I need to get in to the unit. The head diameter is about 12mm and the gap ...
0
votes
1answer
42 views

Is there an approximate substitute for a Torx T40 bit?

I needed a Torx T40 bit for a job, but that bit was missing from my toolbox. I didn't want to strip the bolts (they were fastened tightly over a decade ago), so I had to wait until I could get the ...
0
votes
5answers
909 views

How do I remove plastic shelving molly clips?

I have some closet shelving clips I need to remove to paint a wall. The problem is that they are molly bolts. These are the exact clips/mollys. The question is similar to this one, but in my case,...
4
votes
12answers
22k views

What can I use as a thread “tightener” compound for a free-running bolt?

(I'm familiar with thread "locking" compounds, purple, blue, and red, but that's not what I'm looking for here. They lock once and then upon breaking the joint, do nothing further.) I'm looking for ...
1
vote
1answer
54 views

Which nut/washer combination to join timber to timber (joist to rafter)

I am fitting some new joists in my roof and will be bolting the new joists to the existing rafters. Both joists and rafters are 47mm thick. After some advice from a friend (which may of course be ...
4
votes
2answers
453 views

Is it better to use two nuts, rather than a single long nut on the bolt?

Working on the roof, several J-bolts appeared to have been fastened with more than a single nut. Without exception each such bolt was almost flush to the cement sheet. I saw this done on a car wheel ...
11
votes
4answers
15k views

When bolting down a porcelain toilet, how tight is “too tight”?

Tightening bolts on the base of a toilet is the one thing about toilet installation that has me the most nervous. They say not to over-tighten, but how tight is too tight before the porcelain is ...
0
votes
1answer
44 views

What is the use the plugs over this deadbolt's bolt holes?

When re-keying our house, I came upon these unexpected bolt hole plugs in the deadbolt assembly. Is there a graceful way to remove them? I'd prefer not to take a small prying tool and force them out, ...
0
votes
2answers
89 views

Corner brace with countersink on opposite sides?

Is there a special name for a corner brace which has the countersink on opposite sides? That being that on one leg of the "L" the countersink is on the side pointing out of the angle, where on the ...
57
votes
7answers
13k views

If metal expands when heated, how does heating a bolt loosen it?

If you're having trouble removing a stuck bolt, common advice is to heat the bolt up. But if metal expands when heated, wouldn't heating up the bolt just make it harder to remove? How does heating ...
2
votes
1answer
73 views

Can I use screws for attaching a ladder to a bunk bed?

My wife and I have built bunk beds and the final step is attaching the ladder. The ladder is constructed out of 2x4s will be attached to the 2x6 rails of the bed. (The ladder rails are oriented "...
1
vote
1answer
45 views

How can I treat or replace steel bolts in aluminum nuts to avoid corrosion?

I have a structure originally built from aluminum extrusion with channels using aluminum T-nuts and steel bolts. Over the years, the steel bolts have rusted, making them prone to stripping at the head ...
1
vote
1answer
51 views

Hanging a heavy object with the help of a plywood beam (due to a mismatch with studs)

Two studs in my wall are 24" apart, but the mirror I'd like to hang has hooks that are 32" apart. I'm reluctant to use a hanging wire and shift the mirror a little to the left or to the right, simply ...
2
votes
2answers
559 views

How can I attach a Pergola/lean-to to a pebble dash wall?

I am planning to install a Pergola/Lean-to to the back of my house, to use as a sheltered patio. I have been watching numerous videos and have picked up some fabulous information, however, I'm a ...
0
votes
1answer
44 views

Loose thread in standing lamp between base and rod

My wife just bought a lamp at Target, the kind you have to self assemble the rod from 4 hollow pipes and a base, where the electrical wire is already threaded through all of them. Each of the 4 ...
1
vote
1answer
43 views

Are there transit bolts on this dryer?

We just moved into our new place and our new dryer is making strange rattling noises that sounds as if a small screw or other metal part is stuck somewhere in the machine. We checked all the ...
0
votes
1answer
73 views

How to adapt caster wheel to tubular table leg?

My kids destroyed one of their tennis table caster wheels. Parts of the wheel mount are stuck inside the leg. Is there a way to adapt another wheel? For instance, mounting the wheel externally? I don'...
0
votes
4answers
203 views

What exactly is pitch in terms of nuts and bolts?

Today I needed a nut and washer to hold my bike tire. I had one nut already which I was able to lock on there with a 15mm socket & ratchet. So I figured this meant that the nut must be a 15mm and ...
5
votes
1answer
321 views

Why do lag screws have the unthreaded body between the head and the threads?

Why do lag screws have the unthreaded body between the head and the threads? And why is that 'Body' the same diameter as the outer 'Thread' diameter? Why doesn't the transition immediately abut the ...
1
vote
2answers
761 views

How to tighten a carriage bolt?

I'm trying to assemble a glider patio chair which I ordered. The main pieces (seat, back, sides, etc) are assembled and I'm supposed to just screw the pieces together. How are you supposed to tighten ...
47
votes
8answers
190k views

Should a washer go on nut side, or the bolt side?

Often I take something apart and when I go to reassemble it, I don't remember which side the washer was on. When there's only one washer, does it generally go on the nut side (pressed up against the ...
1
vote
2answers
76 views

Uncommon bolt head

Can anybody please tell me what type of bolt is this? I can not find any tool to remove it. Thanks!
0
votes
3answers
179 views

Over-tightened nut, bolt broken?

I was putting together my home treadmill and most of the bolts screwed into the frame and tightened nicely, but a couple of them will tighten somewhat and then suddenly become loose again when you try ...
1
vote
1answer
136 views

Please advise how to lubricate stiff latch bolt of mortise lockset on metal exterior security door. (NOT the pins in the keyway!)

The latch bolt of the mortise lockset in a metal security door is stiff. I worry about the long-term effect of slamming the door in order to drive the stiff latch bolt back and allow the door to ...
3
votes
1answer
396 views

What should I do if one of the screws for a TV mount breaks?

My wife & I spent a fair amount of time setting up a VideoSecu heavy articulating wall mount in a position & height that we liked. Problem is, the top-left lag screw (5/16" thick, 3" long) ...
3
votes
5answers
12k views

How do I attach a ledger board if I have no interior access?

I would like to build a small, 24" high deck, for a new entry door to the house. I have the deck plans all laid out, and am in need of a 2x10 ledger board under the door to attach the deck to. Most ...
1
vote
3answers
234 views

What kind of wall bolt/anchor is removeable?

What kind of wall bolt/anchor will allow me to remove and replace it as many times as necessary? I am looking to attach a couple of 2x4's flat against a brick wall, however they would only stay there ...
1
vote
2answers
700 views

How to attach a bolt down post support to a fast set concrete post built with

What is the procedure to attach a bolt down post support to a fast set concrete base post? WHat type of bolts and what size should I use to attach this? One of the posts will support a 39" wide gate, ...
4
votes
5answers
14k views

What type of lag bolts should I use for a deck?

I am looking at galvanized lag bolts (for the ledger) and carriage bolts (for attaching the beam to the post) for a deck. I can't find "hot-dipped galvanized" bolts/lag screws only galvanized. Is ...
2
votes
1answer
164 views

Can I reuse anchor bolt sleeves?

A bracket for mounting a TV was attached to my brick fireplace by the previous home owner. All that remains now are four little metal tubes, which I think are leftover parts of some kind of anchor ...
3
votes
1answer
793 views

Plywood plate for mounting to wall

I would like to attach a projector arm to my drywall, but the mounting plate of the arm is a bit wider than a wall stud. http://www.amazon.com/Pyle-PRJWM8-Universal-Telescoping-Adjustment/dp/...
1
vote
3answers
181 views

Installing hook on strange wall

I need to install some hooks on my wall, which I plan to use to perform elastic band exercises. Hence, I need to install these very well so that they will handle the stress properly. Situation is I ...
1
vote
2answers
81 views

How can I safely increase the size of a door bolt?

I live in an apartment right near the garage of the apartment. Every time someone comes in or out of the garage, the change in air pressure causes my door to slam a bit and it sounds like someone is ...
0
votes
5answers
329 views

What kind of blow torch to use for a stuck bolt

I'm trying to remove a tire from a lawn tractor and the bolt is stuck. I've tried all kinds of penetrating oils and an impact driver with no luck. A lot of websites recommend heating the bolt. What ...
1
vote
1answer
133 views

What is this small hollow metal cylinder?

I've bought a flat-pack bed second hand, and it has one part missing. There are two boards I need to join, and according to the instructions I should hammer a short (about 4 cm) hollow metal cylinder ...
0
votes
2answers
235 views

What is the name for this type of anchor bolt with a “leg”?

I'm trying to figure out what this is called. This was used in a basketball hoop to connect a piece of square bar to a flat metal frame. The bolt went through the metal frame, then into a hole in the ...
1
vote
1answer
216 views

How do I shim a steel structure?

I need to affix my steel stringers to a concrete beam. Since the beam was poorly executed, it is not plumb. On this piece I will weld some 5 mm thick plate on the backing, that will have holes for ...
1
vote
1answer
116 views

How can I remove the bolts holding down my utility sink?

I have a utility sink that is sitting on 4 legs, the front two bolted to my cement floor and I want to remove it. I'm not sure what kind of bolts these are. From looking at different kinds of bolts ...
4
votes
3answers
5k views

Are these toilet bolts installed properly?

I had my bathroom renovated and had a new toilet installed. I noticed the white caps on the toilet screws were not secure---- looked like the contractor tried to secure them with some sort of caulking....
2
votes
4answers
601 views

How can I attach structure via oval holes in panel struts in a panel van?

I am trying to build storage for a panel van. My problem is how to make use of pre-existing holes for attaching bolts to. The loading space in the van has vertical structural beams which have holes ...
3
votes
2answers
943 views

What is type of screw is this?

This cylinder-like screw is screwed into an opening on the inside of a table. It basically "locks" into the screw that is facing down from the top. Kind of like this: I'm trying to get them out, ...
1
vote
0answers
358 views

how to attach threaded rod to wall stud on hinge

How can I attach threaded rod to a wall stud so that it is on a hinge. The hinge axle will be horizontal so the rod can rotate up and down but not side to side. The one piece solution I have found ...
2
votes
1answer
361 views

What type of bolt has a shoulder portion above and unthreaded region below threads?

I have a couple Rex folding lounge chairs: However, during my move one of the bolts connecting the base to the side came loose and was lost. I took out the one from the other side and I've never ...
0
votes
1answer
2k views

How can I attach the frame of a bed to legs using carriage bolts? [closed]

I have a bed that I have been building - it has 4x4's for the legs, and I want to attach the frame of the bed (the part of the bed that runs from front legs to back legs, structural support) to the ...
2
votes
1answer
420 views

How can I secure a wall-mount server rack?

I would like to install a 2-Post 12U wall-mounted server rack in my utility closet. The rack will hold up to 200lbs. However, my equipment will be just under 180lbs. Most of the weight will be at the ...
2
votes
1answer
5k views

What is the meaning of the letters on the top of a common hex bolt?

I recently drilled and tapped a 5/16"-18 in a piece of soft steel, then found that the 5/16"-18 bolt I had chosen wouldn't fit (the bolt was slightly too large). When I found that other 5/16"-18 ...
1
vote
5answers
3k 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 ...
1
vote
1answer
261 views

Is there a standard hole diameter for corner braces?

I'm planning a project that requires corner braces, and I want to figure out what size bolts I can put through them. Unfortunately, at least on the Home Depot website, the corner brace product ...
5
votes
2answers
6k views

Which way should an internal star lock washer go?

I want to attach a rear basket to my bicycle and I don't know a thing about nuts/bolts. I got a plastic bag full of nuts, bolts, washers, and what I believe (according to what I could find on the ...