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Hex size on a Large FLange

Hex size on a Large FLange

Hex size on a Large FLange

(OP)
I have a 30" 900 Lb Flg, which uses 20 3" hex bolts. I was wondering the Hex size of the 3" bolt?
Tks-
C. Fee

RE: Hex size on a Large FLange

4.5 width across flats for
A449 and A354 hex bolts
ANSI B18.2.1
Structural Bolting Handbook

RE: Hex size on a Large FLange

(OP)
DIAMONDJIM-
Thanks!
C. Fee

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