AM2- Clipping cables to tray with P clips?

[ipf]

Screws ? Or did you mean bolts

Screws......as in brass 4mm or 2BA, as used to be used.

I hope you're not talking roofers

 

[brianmoooore]

It is bit daft if you have no screws to help fit them all.


Screws ? Or did you mean bolts

I've never seen a 4mm brass bolt - all have been screws. Bolts have an unthreaded section part way along the shaft, starting from the head.
The only brass bolts I've commonly come across are supplied with clamps for earth rods.

 

[mainline]

I've never seen a 4mm brass bolt - all have been screws. Bolts have an unthreaded section part way along the shaft, starting from the head.
The only brass bolts I've commonly come across are supplied with clamps for earth rods.

M4 x 30mm Hex Bolt Full Thread in solid Brass - DIN 933 - Westfield Fasteners Ltd

www.westfieldfasteners.co.uk

 

[brianmoooore]

M4 x 30mm Hex Bolt Full Thread in solid Brass - DIN 933 - Westfield Fasteners Ltd

www.westfieldfasteners.co.uk

That's a type of screw, not a bolt, as the first line of the description alludes to.

 

[ipf]

What’s wrong with 6mm brass nuts and bolts for banjos?
For me, a bolt doesn’t have a screw driver head. It’s the way you interpret, same as umpteen other items.

 

[nicebutdim]

What’s wrong with 6mm brass nuts and bolts for banjos?
For me, a bolt doesn’t have a screw driver head. It’s the way you interpret, same as umpteen other items.

Don't you go spoiling a potential 3 day argument

 

[ipf]

Don't you go spoiling a potential 3 day argument

OK, I’ll bolt off.
I’m sure MK didn’t know what he was starting.
How’s it gone today by the way, MK?

 

[mainline]

That's a type of screw, not a bolt, as the first line of the description alludes to.

Its actually listed as a bolt
M4 x 30mm Hex Bolt Full Thread in solid Brass - DIN 933



The defining distinction, per Machinery's Handbook is in their intended purpose: Bolts are for the assembly of two unthreaded components, with the aid of a nut. Screws in contrast are used in components which contain their own thread, and the screw may even cut its own internal thread into them. Many threaded fasteners can be described as either screws or bolts, depending on how they are used.

 

[brianmoooore]

A correctly specified bolt used to join two accurately machined components together will allow minimal lateral movement. Substitute a screw, lateral movement can occur and the stresses in the fixing will increase, sometimes to the point of failure.
Hex bolt Full Thread is an oxymoron.

 

[pc1966]

A correctly specified bolt used to join two accurately machined components together will allow minimal lateral movement. Substitute a screw, lateral movement can occur and the stresses in the fixing will increase, sometimes to the point of failure.
Hex bolt Full Thread is an oxymoron.

I always used the definition that a bolt was only part-threaded, while a machine screw was fully threaded.

Normally a bolted fixing is held under compression so the threaded/un-threaded aspect ought not to alter lateral movement. If accurate alignment is needed you could attempt to use the un-threaded portion but really at that point a properly fitted dowel is going to do a much better job.

While it is tenuous to call it "electrical work", you see some microwave parts with dowels fitted as the active part is so small and needs such accurate alignment that typical screw/bolt arrangement is just not good enough. For example:

W-Band Waveguide Straight Sections 75-110GHz

Mi-Wave’s 690 Series flanged waveguide sections & bends are available in standard waveguide sizes from 8 to 500 GHz.

www.miwv.com

 

[davesparks]

Wrong side of the bed this mornin' ?

No, I just hate seeing trainees put down for the sake of making someone else feel big and clever.

 

[ipf]

No, I just hate seeing trainees put down for the sake of making someone else feel big and clever

Blimey! Still at it.

Ever remember being an apprentice?