turn of the nut for A449 bolts?

[HgTX]

Are there published recommendations/requirements for installing A449 bolts by the turn-of-the-nut method? RCSC only covers A325 & A490.

Hg


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[dinjin]

http://www.portlandbolt.com/technicalinformation/astm/ASTM_A449.html

says they are the same strength as A325 except they have extended sizes in the larger diameters

 

[HgTX]

They're the same strength, but I believe a different thread configuration, which would change the turns.

I can't really back-calculate it, since the A325 turn requirements are lumped and simplified.

Hg

Eng-Tips policies: faq731-376

 

[Duwe6]

If the thread pitch is the same -- UNC -- then Turn-of-the-Nut will work. Watch your Length vs. Diameter ratio, as per RCSC spec.