Square head bolt - correct term

[PEG]

I just had a peep at a listing from Nettlefolds,who were one of our longest standing engineering manufacturers of fixings.

Although looking identical,they list "Carriage Bolts" and "Cup Square Bolts" as different items.

Carriage Bolts,are listed up to 7/16" diameter and 16" long,and have no B.S.S number.

Cup Square Bolts,are listed up to 1 1/2" diameter and 12" long (additional lengths on request) and have a B.S.S number for both bolts and nuts,that is,an engineering specification in terms of strength and conformity,for use in engineering applications.

Anybody who has any questions regarding their selection of moulders brads,clyde dog eared steel brobs,or wrought iron holdfasts...just send me a telegram

(I have the telegraph and cable order code documents,which are fascinating...£40 in 1886,was coded "ketchup" seems a long way from Skyping me pal in New Zealand,on an S9...)

 

[Edtwozeronine]

I thought they were called M6 roofing bolts.

 

[Intoelectrics]

I thought they were called M6 roofing bolts.

Usually roofing bolts don't have a square shank, but rather have slots on the dome head so a tool can be used to stop them turning rather than relying on the square shank pulling into the timber. This said I have heard, the terms coach, carriage, roofing, dome head... for all sorts of similar bolts and screws.
I guess its probably down to what ever is the most common traditional term local to your area.

 

[farmer]

Boulon is the name I was told which is the French for bolt! I spose it's a colloquial term

 

[telectrix]

here you go. square heads. :

 

[ruston]

here you go. square heads. :

So are the bolts Bosch?

 

[telectrix]

vorsprung durch tecknik

 

[ruston]

Audi spell coach bolt then ?

 

[telectrix]

Audi can't even spell Howdy.

 

[ruston]

That's why we Northerners call them coach bolts . We cant spell that long word.

 

[Strima]

here you go. square heads. :

German Army sparkies???

 

[Pete999]

Roofing Bolt

AKA a bolt with a square shank, ie a square shancked bolt

 

[Pete999]

Roofing Bolt

AKA a bolt with a square shank, ie a square shancked bolt

AKA coach head bolt

AKA who cares?

 

[Pete999]

Roofing Bolt

AKA a bolt with a square shank, ie a square shancked bolt

AKA coach head bolt

AKA who cares?

 

[telectrix]

on the subject of screws. i just ordered some "robertson"square pan heads 8s x 1 1/2 inch, just to upset future young sparkys after i'm dead and buried.

 

[Pete999]

Oh here we go.

 

[telectrix]

Oh here we go.

.

 

[Pete999]

.

You just had to, didn't you?

 

[telectrix]

almost went for the security screws, the ones that will only turn clockwise in but cam out if an attempt is made to remove,

 

[pirate]

Haha Tel!
my favourite screws, those!

Many deacades ago the square socket screws were quite common in boatyards...those producing bespoke yachts, I mean.
Had to make sure the "slots" were tightened up just right, so they were "all square"!
Naturally, the modern square drivers are not a perfect fit...