Bolt V screw

[DaveMcT]

A bolt should not be driven by the head because it will twist and absorb some of the tightening torque, When that relaxes the bolt comes loose. A screw wont cope better, it just gets used for less heavy torques.

So a bolt threaded all the way up is weaker and less tortionally stiff than a part threaded bolt. For some reason its called a set screw. Logical? Not really. But if you think that's annoying try doing human anatomy.

 

[Focus Owner]

ok then

this is a philips male driver

 

[Focus Owner]

A bolt should not be driven by the head because it will twist and absorb some of the tightening torque, When that relaxes the bolt comes loose. A screw wont cope better, it just gets used for less heavy torques.

So a bolt threaded all the way up is weaker and less tortionally stiff than a part threaded bolt. For some reason its called a set screw. Logical? Not really. But if you think that's annoying try doing human anatomy.

youve said my magic words a screw is threaded all the way up.
maybe anything with a strength stamp

 

[jip0]

dont be silly thats a sonic screw driver used by doctor who

 

[Focus Owner]

ok then. this is only good for screws not bolts jip?

 

[jip0]

thats a hose pipe attachment, used to wash clay, wash polish and wax a car in one go, duh

 

[bludvl_x19]

youve said my magic words a screw is threaded all the way up.
maybe anything with a strength stamp

Erm, not quite....

This is a timber screw.

 

[Focus Owner]

and thats the problem with that one.
but it does have a tapered point.

do like the a bolt is not used to tighten one a bit tho

 

[sludgeguts]

I agree with what's been posted, a screw goes into a tapped hole or non tapped hole. Anything that has a nut on the end, is a bolt.

However, the exception is when a bolt holds something on, for example wheel bolts, they just go into a hole and are therefore screw-like, but the existence of the wheel before the medium that the bolt goes into makes it a bolt.

If that makes any sense at all

but the bolts holding the wheel in place don't just go into a hole, they go into a series of pre-threaded holes which replaces the nuts. The alternative is a series of studs fixed to the plate so that the wheel is held on by nuts.

Helps if you use the correct screwdriver.

30-odd years ago we sold these individually or in sets and they were described as 'nut spinners'.

 

[GeorgeDamper]

In prison a Screw is a guard and a Bolt is an escape - sometime referred to as a "Harry Holt" in Cockney Rhyming slang.

 

[dave]

 

[chr1s]

PS Good thread

 

[Shadeyman]

 

[jenks69]

My head hurts reading this thread......

IMHO

a bolt is used when there is a pre defined hole with coresponding thread.

a screw is used where there is no predefined thread.

 

[Eklipze3k]

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[Shadeyman]

 

[DaveMcT]

Bolt:

Screw:

Debbie Does Dallas sensored

 

[dronenrs]

 

[craigb244]

already been said but to me it is

bolt: has a parallel shank (head or thread type dont matter)

screw: tapered shank

 

[DaveMcT]

Could be -

http://euler9.tripod.com/bolt-database/boltdef.html