What do you call a 6 inch bolt?

iamcornholio

For fences you need to use proper bolts that go through the concrete posts and rails, and not frame fixings or such-like

Frame fixings etc are designed for vertical loads, whereas fence panels need to resist being blown horizontally - and this will pull frame fixings out

Andy_L

iamcornholio wrote: »

Those are coach screws

Aren't Coach Bolts/screws synonyms or a US/UK thing? I'd call them a coach bolt becasue they've got a hex-head like a bolt.

iamcornholio

Andy_L wrote: »

Aren't Coach Bolts/screws synonyms or a US/UK thing? I'd call them a coach bolt becasue they've got a hex-head like a bolt.

They both have hex heads, its just that the bolt has a nut on the other end, and the screw has a pointed wide thread for screwing into timber

partan

coach screw has a hex head, coach bolt has a round head

Andy_L

iamcornholio wrote: »

They both have hex heads, its just that the bolt has a nut on the other end, and the screw has a pointed wide thread for screwing into timber

So whats the difference between a "coach bolt" and an ordinary "bolt"?

In "Andy land" (a grant you a strange & confusing place to be):

Coach bolt - tapered wood screw thread, that, possiblr, changes to a parallel, unthreaded shaft, & a hex head so you can get a spanner on it & give it some welly to tighten it up

Bolt - parallel thread for a nut & and a hex head but the thread stops about 2/3rd up the shaft

Machine screw (just to confuse the issue;)) like a bolt but the thread runs all the way up the shaft to the hex head

Andy_L

partan wrote: »

coach screw has a hex head, coach bolt has a round head

is that not totally counter-intuitive? screw: screw-driver, bolt: spanner or am I just being to logical for a system that dates back 100s of years?

Edit: now thinking about it doesn't one of them have a round head (with no slot for a screwdriver) but has a square/hex bit underneath it that gets pulled into the wood to keep it from turning whilst you do up the nut on the other end?

Further Edit: it's all coming back to me now:
Coach Screw: Hex head & tapered wood screw thread - called a screw because it doesn't go all the way through
Coach Bolt: domed head with square-ish shoulder underneath & parallel screw thread - called a bolt because it does go all the way through

marleyboy

You mean Concrete bolt posts -

http://www.ebay.co.uk/sch/i.html?_nkw=concrete+post+bolts

yangptangkipperbang

"What do you call a 6" bolt ?"

A "fo" or an "ot" ? (half a foot !)

withabix

iamcornholio wrote: »

For fences you need to use proper bolts that go through the concrete posts and rails, and not frame fixings or such-like

Frame fixings etc are designed for vertical loads, whereas fence panels need to resist being blown horizontally - and this will pull frame fixings out

Nonsense.

Frame fixings are designed for use in tension, shear or a combination of both.

iamcornholio

withabix wrote: »

Nonsense.

Frame fixings are designed for use in tension, shear or a combination of both.

Oh. Is that why they can be pulled out with a nail bar?

That type of fixing requires the item to be pulled tight with no play, else it loosens the fixing. So no good for fence work