A307 Heavy Hex Head
A307 Heavy Hex Head
(OP)
I work for a firm that always specs A307 as heavy hex head bolts. These are for items like stairs and handrails. Before coming here I had always just specified A307 Gr A for such things which by default comes as standard hex.
I have a few questions.
Is specifying A307 heavy hex in structures a common practice?
What is the extra cost? (I already contacted a vendor. He was no help.)
Why would you want a heavy hex head to bolt a stair tread to stringer (as an example) anyway?
I have a few questions.
Is specifying A307 heavy hex in structures a common practice?
What is the extra cost? (I already contacted a vendor. He was no help.)
Why would you want a heavy hex head to bolt a stair tread to stringer (as an example) anyway?






RE: A307 Heavy Hex Head
Not sure about the extra cost, but I'm sure you'd have to take other factors into account such as galvanizing, dimension of nut considered, etc.
RE: A307 Heavy Hex Head
RE: A307 Heavy Hex Head
Depending on size, say 1/4" to 1 1/2", A307 Gr A Bolts use a Standard A563 Hex Nut. From 1 5/8" up, A307 Gr A Bolts use a A563 Heavy Hex Nut.
All A307 Gr B Bolts are Heavy Hex Bolts and require A563 Heavy Hex Nuts for all sizes.
I don't think I answered any of your questions but I am sure I confused the hell out of the topic !!!!
RE: A307 Heavy Hex Head
Dik
RE: A307 Heavy Hex Head
The following link suggests where A307 Heavy Hex Head are used:
http://w
BA
RE: A307 Heavy Hex Head
BAretired, I agree with that. Yes, I'm aware of using Grade B for cast iron flanges.
RE: A307 Heavy Hex Head