Does a bolt always need a nut?

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Does a bolt always need a nut?

Thanks to their threads, bolts can provide an unparalleled level of holding power. They do require a nut and a washer for their installation. Like screws, bolts come in many sizes and types. They’re also usable with several materials ranging from metal and wood to concrete.

How do I know what size nut I need for a bolt?

How to Measure The Size of a Nut

  1. Measuring Between the Flats. Lay the nut on a flat surface so that the hole lays flush.
  2. Measuring for Diameter. Lay the nut down as you did in Section 1.
  3. Measuring for Thread Coarseness or Fineness. Count the number of threads along the inside thickness of the nut.

How do I choose a bolt size?

A typical rule of thumb . . . Use a bolt diameter that is 1.5 – 2.5 times (up to three times) the thickness of the thinner material you are bolting together. So, for 1/8″ material, a 1/4″ diameter is often a good bolt choice. For 1/4″ thick material, perhaps a 3/8″ or 1/2″ bolt.

How do you keep a nut from unscrewing?

Things You’ll Need There are specially designed nuts with nylon inserts built in or flanged washers attached to keep the nut securely in place. There are also split, or lock, washers to help prevent unwanted loosening.

Will anti seize cause bolts to loosen?

Adding anti-seize will cause the bolts to loosen and quite quickly. This is due to the extreme vibration of the 2 stroke engine. However using low strength locite not only stops the bolts from loosening, but also slows corrosion.

Is it OK to use never seize on lug nuts?

But experts tell us not to use any lubricant, including anti-seize compound, on wheel studs or nuts. The tech folks at Tire Rack state: “Torque specifications are for dry threads only. The fastener threads should be free of oil, dirt, grit, corrosion, etc. It is important NOT to lubricate hardware threads or seats.

Should you use anti-seize on bolts?

Anti-seize should be used when dissimilar metals are involved (steel bolt into an aluminum brake caliper), when threads may be exposed to corrosive effects (suspension fasteners), where high-heat may accelerate corrosion (manifold, turbo, and exhaust fasteners), and on fasteners that frequently get removed (underbody …

Can you put anti-seize on exhaust bolts?

If you are reusing exhaust manifold bolts (which we don’t recommend), apply a metal fortified anti-seize to your manifold bolts. If you’ve just removed the broken bolts and ready to complete the repair, chase the threads clean and use fresh OEM bolts for best results.

Should you use Loctite on header bolts?

NO! Do not put red Loctite on your header bolts! Bad deal all around! Depending on the gaskets you used, you may have to tighten them numerous times as the gasket takes a set.

Should I use Loctite on exhaust manifold bolts?

I would not use a loctite product on the exhaust manifold bolts. The small block chevy has a similar problem with it’s exhaust manifold bolts. The trick thing to do is use a locking tap washer similar to the small block chevy design on the Buick V6.

What grade are exhaust manifold bolts?

Grade 8

Can you use regular bolts on exhaust?

You can try a regular steel bolt and nut, use anti-sieze on it but don’t expect that to last long with the temps experienced. Grade 5 should be good and many systems use plain grade 3 at the back of the exhaust.

Can you use stainless steel bolts on exhaust?

Re: Stainless bolts for exhaust manifolds I’m sure they use stainless bolts on jet exhausts as it won’t react with the titanium like cad plated hardware will. If it works there, it should be FINE on an air cooled engine exhaust.

What are exhaust studs made of?

Studs and bolts come either black oxide chrome moly or Stainless 300. Both are nominally rated at 170,000 psi tensile strength; substantially stronger than Grade 8 hardware.

What size are header bolts?

16 x 1 Inch

What size are SBC header bolts?

Correct header bolts are grade 8 or comparable 3/8″ x 1″ w/ 16 threads per inch or 3/8-16 x 1. The 1″ is under head length. The 3/8″ is thread size.

Why stud is used instead of bolts?

Studs provide the ability to obtain much more accurate torque values because the studs don’t twist during tightening as do bolts. Because the studs remain stationary during nut tightening, the studs stretch in one axis alone, providing much more even and accurate clamping forces.

What are header bolts?

Gasket to find out what are header bolts, and why are they so important in protecting your car from exhaust leaks and horsepower losses. 1. Gasket: The header bolt function is to provide a consistent clamp-load to seal the header flange, exhaust gasket, and cylinder head together.

What do you put on header bolts?

I use either Anti-seize or lock-tight on just about every bolt or nut I install. I do use anti-seize on header bolt, especially with aluminum heads. Just use good copper or aluminum gaskets and retighten em a couple of times as has already been menteined.

Are ARP bolts worth it?

The precision and extra strength of ARP means the sockets fit better and the metal on the fastener won’t strip. And ARP mean your mill will live longer and have fewer problems than with stock style bolts. It’s worth it. Better, more consistent clamping on head gaskets, rod bolts, etc.

What is better head bolts or studs?

In other words, head studs are better suited for high-performance vehicles with greater power requirements, while head bolts are more practical for personal, everyday automobiles. Therefore, it would be inaccurate to conclude that one type of fastener is categorically superior to the other.

How do you tighten a stud?

Use a wrench to tighten the lower nut against the upper one, jamming them together (you’ll need a wrench to hold the upper one as well to prevent it from turning). Next, place a wrench on the lower nut and turn it counter-clockwise; the stud should walk right out.

Why are studs stronger than bolts?

Main studs Studs provide the ability to obtain much more accurate torque values because the studs don’t twist during tightening as do bolts. Because the studs remain stationary during nut tightening, the studs stretch in one axis alone, providing much more even and accurate clamping forces.

How do you tighten earring studs?

By gently squeezing the two circles of metal back together, either with fine pliers or a very strong finger grip, the circles will close together and make the grip on your stud post nice and tight again.

How hard is it to install a carburetor?

Carburetors can wear out for multiple reasons. If your engine is hesitating, stumbling, stalling, letting out black smoke, or has a hard time starting you may need to replace the carburetor. As intimidating as it may look, replacing a carburetor is an easy task that can be completed in just a few steps.

How tight should carburetor bolts be?

60-80 inch-lbs, or roughly 5-6 ft-lbs. Non-technically speaking, about as snug as you can get them with a hand-held nut driver.

When did they stop making screw back earrings?

However, the custom of piercing ears fell out of vogue around the same time. Screw backs were more prevalent from the early 1900s through the early 1950s, and then clip earrings (first used in the early 1930s) had a mid-century surge in popularity.

If the nut is metric, count the number of lines on the tape measure to find the measurement. If you count 9 lines, the size is a 9-mm (millimeter) nut. If the nut is US standard, count the smallest lines on the tape measure in sixteenths. Add the sixteenths together to find the size.

Should you tighten the nut or the bolt?

The answer depends on your application and the condition of the materials being fastened. In many situations you can apply torque to either the nut or the bolt head. Both will result in a tight connection and neither will avoid breakage more often (that occurrence can be avoided through other means).

How many times can a bolt be torqued?

Plain ASTM A325 bolts, however, possess sufficient ductility to undergo more than one pretensioned installation as suggested in the Guide (Kulak et al., 1987). As a simple rule of thumb, a plain ASTM A325 bolt is suitable for reuse if the nut can be run up the threads by hand.”

What happens if a bolt is over torqued?

Everyone who has ever worked with fasteners has accidentally messed one up at some point. One of the most damaging ways to do that is by over-tightening, or over torquing the fastener. This can result in stripping screws, snapping screw heads and damaging pre-tapped threading.

How much does a bolt stretch when torqued?

To appropriately answer this question, it helps to first consider that only approximately 10-15% of the input torque actually stretches the bolt; the remaining 85-90% of input torque is primarily used to overcome friction between the mating threads and friction under the bolt head or nut.

What happens if you reuse stretch bolts?

However, because the tightening procedure does permanently stretch the bolt, there is some risk of breakage if the bolt is reused. And since there is no way to tell how many times a bolt has been reused, it doesn’t make any sense to reused TTY bolts – the risk far outweighs the replacement cost of used bolts.

Is it OK to reuse head bolts?

Can I reuse head bolts? A head bolt should not be reused if the threads are galled or badly damaged. Chasing damaged head bolt threads with a die will clean up the threads but also remove material (metal) and undermine the head bolt’s ability to torque down and hold to specs.

What happens if head bolts are not tight enough?

But even the best head gasket won’t maintain a tight seal if the head bolts have not been properly torqued. Uneven loading created by unevenly tightened head bolts can distort the head. Over a period of time, this may cause the head to take a permanent set.

Can I reuse torque to yield bolts?

Torque-to-yield (TTY) head bolts are designed to stretch when used. Once stretched, they are not as strong as before. Because the tightening procedure permanently stretches the bolts, there is a risk of breakage if reused.

What is the purpose of torque to yield bolts?

What is a torque-to-yield bolt? It is a one-time-use fastener that is designed to stretch during the torquing process (installation).

Should you re torque head bolts?

Certain types may require you to re-torque the head bolts. And if it’s needed, you should do it. Re-torque the bolts as required while your engine is warm. But if you’re using aluminum cylinder heads, you should wait until your engine is complete cooled until re-torquing.

What happens if you dont torque head bolts?

If the head isn’t torqued down properly, then the most likely failure is of the head gasket, which could lead to loss of compression, the mixing of oil and coolant, exhaust gases getting into the oil ways or cooling channels, erosion of the cylinder head, overheating and warping of the cylinder head.

Can you over torque head bolts?

When you overtorque above 15% of recommended which in this case would be about 95 ft/lbs you basically turn the fastener into a rubber band. Some of the fasteners will stretch and you will have uneven torque. Add heat and pressure and head gasket blows and the head can even warp.

Which side of head gasket goes up?

The edge of the gasket with the Up stamp must be kept up toward the top of the engine block.

Can you use 2 head gaskets?

it is better to use one. two won’t harm anything but sometimes having two will cause one gasket to squeeze outward and create a leak. also, two will raise the head slightly causing slight compression drop. Replace the one that leaks with the new one but that may or may not fix the problem.

Is changing a head gasket hard?

Replacing a head gasket is a difficult job and should be left to skilled mechanics. Even if you have a friend who knows a lot about cars, it’s a big job to trust to a weekend wrencher that usually takes specialty tools and a lot of experience. BlueDevil head gasket sealer is guaranteed to seal your head gasket leak.

Do you need to replace head bolts when replacing head gasket?

A poorly installed gasket leaks and can damage other engine components. All in all, it’s often best to install new head bolts when you work on your cylinder head or head gasket, unless you can be absolutely sure the age and condition of your current ones.

Should you oil head bolts?

Yes, you should lightly oil head bolts when you install them. You don’t want to have the bores full of oil or anything, but lightly lubricate the threads and heads. Torquing a bolt that size dry will give an inaccurate and insufficient torque because of the friction of the bolt head against the head surface.

When should you Retorque head bolts?

In most cases you don’t need to retorque head bolts or studs. If the bolts or studs aren’t tight you will lose compression or get coolant in your cylinders. You can use bolts or studs based on application, but studs tend to give more consistent torque values. Never reuse Torque-To-Yield (TTY) bolts.

Can you replace head gasket without removing engine?

Generally, yes, you can replace a head gasket without removing the engine. There are exceptions to this, in front wheel drive applications it can be quicker to drop the engine and front cradle with the engine and transmission together to service a cylinder head.

Can you still drive a car with a blown head gasket?

Blown your head gasket? Keep driving with a blown head gasket and it will inevitably lead to further car trouble. K-Seal can stop the problem in its tracks, before it’s too late. Technically you can drive with a blown head gasket, but we’d always advise against it.