TC A490 bolts / washer & nut reuse?
TC A490 bolts / washer & nut reuse?
(OP)
Have a condition that requires the replacement of 400 A490 1" TC bolts. Upon removal the nuts and washers will not be in as-manufactured condition (clean/lubricated) so they can not be reused, correct?
Specification for Structural Joints Using ASTM A325 or A490 Bolts
2.3.3. Reuse: ASTM A490 bolts and galvanized ASTM A325 bolts shall not be reused.
Specification for Structural Joints Using ASTM A325 or A490 Bolts
2.3.3. Reuse: ASTM A490 bolts and galvanized ASTM A325 bolts shall not be reused.






RE: TC A490 bolts / washer & nut reuse?
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: TC A490 bolts / washer & nut reuse?
http://www.FerrellEngineering.com
RE: TC A490 bolts / washer & nut reuse?
RE: TC A490 bolts / washer & nut reuse?
RE: TC A490 bolts / washer & nut reuse?
RE: TC A490 bolts / washer & nut reuse?
If that is the case, I see no problem if, after a visual inspection no problems are detected. The no reuse rule has to do with the plastic elongation and hence property change on the bolt shaft, not the nut or washer
RE: TC A490 bolts / washer & nut reuse?
The bolts are being removed and discarded.
I was curious about the nuts/washers. Are the TC bolts, washers, and nuts an assembly? By the time they are removed the factory lubricant will have been significantly removed. If the nuts/washer were reused the components would have varying degrees of lubricity so how would I be able to perform the required pre-installation tests?
RE: TC A490 bolts / washer & nut reuse?
If you were to try to re-use the old nuts and washers, you would have to break some extra new bolts with old nuts and washers in a Skidmore to see if the installed tension is within range. By the time you do this, you'd probably be better off just replacing them.
Michael.
Timing has a lot to do with the outcome of a rain dance.