pop rivets - proper way to use?

[Jdsk]

Bolts are bolts, and screws are screws.
Bolts have "land" below the head and screws are threaded all the way up to the head.

Wood screws and other "fixing" screws are a different thing entirely.

Engineering wise, a screw is a screw and a bolt is a bolt .......... as I stated.

Is that a way of agreeing that that fastener in the image upthread is a screw rather than a bolt despite having ""land" below the head"?

So how do we decide when to apply that rule and when not to?

Thanks

Jonathan

[Jdsk]

Ah-ha - the old, "When is a screw a bolt?" debate... why d'you think I used pop rivets?

: - )

But did you spot the confusion about open and closed and blind rivets?

All pop (and indeed POP®) rivets are blind but some are blind and open and others are blind and closed.

Jonathan

[simonineaston]

Aaaaaarrrrggghhh... !!

[Jdsk]

I think this thread might drift into lamp/bulb territory with those that know using the correct term and everyone else the popular albeit wrong term...

It's an interesting comparison. I sometimes choose to use those terms in the narrower sense when I think it might be useful. But I wouldn't describe the narrower uses as correct or wrong...

The strange thing about the screws/ bolts discussion is that some people are willing to assert absolute definitions despite the counterexamples being blatantly obvious. The comparison that I would draw is with English usage where some people desperately hold on to what they think they were taught at school. We've got a thread all about that!

Jonathan

[thirdcrank]

Sorry everybody.

I only meant to go along with Mick F's system but I was cautious about saying "nuts and bolts". :oops:

[Jdsk]

Bolts are bolts, and screws are screws.
Bolts have "land" below the head and screws are threaded all the way up to the head.

Full stop.

Wood screws and other "fixing" screws are a different thing entirely.

Engineering wise, a screw is a screw and a bolt is a bolt .......... as I stated.

What would you call this fastener?



Thanks

Jonathan

[rjb]

What would you call this fastener?



Thanks

Jonathan

Fastener? That would be as much use as a chocolate teapot to hold two or more parts together.

[Jdsk]

?

Holding two parts together is the precise purpose of grub screws... whatever they're called.

Jonathan

[wirral_cyclist]

That's a threaded locater pin that is.

[rjb]

It looks like a stud or stop, not for joining.
Locater pin. Thanks that makes sense

[Jdsk]

: - )

The supplier calls them "Slotted Head Part Threaded Set / Grub Screws (DIN 427)".

And DIN 427 refers to "Slotted headless screws with chamfered end".

But if the fully threaded./ partly threaded definition were valid what name would it generate?

Jonathan

[PH]

?

Holding two parts together is the precise purpose of grub screws... whatever they're called.

Jonathan

Again no, a grub screw can have many purposes, it's a screw because it screws into a threaded part, it's purpose might be to plug, as in a grease port.

[Jdsk]

Holding two parts together is the precise purpose of grub screws... whatever they're called.

Again no, a grub screw can have many purposes, it's a screw because it screws into a threaded part, it's purpose might be to plug, as in a grease port.

But we agree that it can be used to hold two parts together as well as doing those other things?

Jonathan

[rjb]

Holding two parts together is the precise purpose of grub screws... whatever they're called.

Again no, a grub screw can have many purposes, it's a screw because it screws into a threaded part, it's purpose might be to plug, as in a grease port.

But we agree that it can be used to hold two parts together as well as doing those other things?

Jonathan

Show us how that would hold 2 parts together securely.

[Jdsk]

Fixing a pulley on a shaft. Typical grub screw application.

Jonathan