0
What size drill bit should you use to drill a hole that is threaded for a 1by4-20 UNC bolt?
Wiki User
∙ 11y ago
Your meaning is not clear. - If you are going to tap the threads in, use a 7/32 drill bit. If you want a hole that this bolt will slip through, use a 9/32 drill bit.
Wiki User
∙ 11y ago
Wiki User
∙ 11y agoIf you are going to tap that 20 UNC thread, then use a 7/32 drill bit. If you want a hole that the bolt will slip through, use a 9/32 drill bit.
Add your answer:
Earn +20 pts
How do you fit a rear spoiler to citroen saxo?
drill 2 holes at each end of the bootlid to correspond to the threaded bolts on the spoiler then sit the spoiler in the holes and bolt from inside.
What should be applied to each threaded connecting rod bolt?
Motor oil in small amounts
How do to remove a stripped motor mount bolt on a SSEI Bonneville?
Well your gonna have to have a new mount bolt. Drill it out so that the drill bit is the same size as the hole the bolt goes into. Snap the head off when you drill past thehead. The bolt should hand screw out. If not use vicegrips. Then put the new one in the same place. Should replace the mount aswell.
Why does a 1969 dodge slant six spray oil from the front exhaust manifold bolt hole?
There should be a stud (not a bolt) threaded in to the head and the stud should have a thread sealant applied to the threads.
How do you replace a old bolt from the pulley when the thread is bad?
Cut the bolt head off with a cutting wheel then use a drill to drill out the bolt.
A bolt that is threaded into a casting is called?
Cap screw
What is difference between Stud and stud bolt?
stud has all its length threaded and it is used with two nuts, but the bolt has one end closed and the other end is threaded ,it is used with a single nut.
Is the bolt on a Chevy truck idler pulley threaded backward?
NO it is not.
How do you get a bolt that has been broke off in the intake out?
The best way is to use a drill bit for metal and drill a small hole in the bolt. then use an extractor to back the broken bolt out.
How do you drill out a broken bolt?
There are several options. -Bolt extraction kits, you can probably get one at your local autoparts store. Drill a hole in the bold and insert the extractor, turning counter-clockwise. You may need to tap it in with a hammer first. It's best to use a reverse-thread drill bit to drill the hole. They should be in the same section as the extraction kits. The advantage of the reverse-thread drill bit is that it turns counter-clockwise, the same direction you need to turn the bolt to get it out, thus the drill alone may pull the bolt out if the drill bit catches and the bolt is loose. Use caution when using the extraction kits though. They are brittle and if you overtorque it you can end up breaking the bit in the hole. Then you have a much bigger problem. -If enough of the bolt is above the surface, you can use a dremmel to cut a notch, then use a flat-head screw driver to turn the bolt out. -For really stubborn bolts, you can drill the bolt out completely and re-thread the hole. This should only be attempted if you have a drill press. If you are using a hand drill and eyeballing it you will probably end up messing up the hole and the threads. -Depending on the age and condition of the metal that the hole is in and if lock-tight has been applied to the bolt, heat may be used to loosen the bolt. Heat the area around the hole with a propane torch. -If all else fails, take it to your local machine shop and have them drill it out for you.
How do you remove a stuck ejector pin from a savage 110 bolt?
Take bolt apart take bolt head and clamp in a drill press use a 3/32 drill bit to drill it out shouldn't have to drill all the way out . Numrichs brownells and midway usa have the ejector the spring and the retaining pin
Could the reversable drill bit extract a broken bolt?
Not unless it was reasonably loose. Usually when faced with this, I drill into the bolt with a very hard drill bit a tiny bit thinner than the bolt - ie if it's a 3/8 bolt, I drill in first with a 1/8 drill to create a guide hole, then after with a 5/16 drill to cut right through, yet not harm the threads. You have to be very careful to stick to an exactly straight course. After the hole is cleared, I pull the threads left from the bolt out as far as I can, then use a 'clearance' tap of bolt size to re-tap the hole.
