Loctite on Structural Bolt?
Loctite on Structural Bolt?
(OP)
I have here in my hand a structural steel spec that says in addition to pre-tensioning (structural) bolts, Loctite Threadlocker shall be applied. For the most part, these would be 3/4" A325 bolts. I've never heard of doing this before to structural bolts. It is for some modules that will be shipped by road and the theory is this will keep the bolts from vibrating loose. I would have thought the pretensioning would be sufficient to prevent that. Has anybody heard of doing this with structural bolts? If so, what type of Threadlocker would be used? I quick glance through the Loctite site doesn't suggest to me that it is intended to be used for this.
Bottom line is, should we push back on this requirement? Thanks.
Bottom line is, should we push back on this requirement? Thanks.






RE: Loctite on Structural Bolt?
1. Pretension is intended as a design element and the EOR is relying on having the full pretension during the service life of the module.
2. Loctite as a measure to prevent any loss of pretension
If pushing back on the use of Loctite because you are unfamiliar, I would at a minimum, come back with an alternate suggestion to maintain full pretension during shipping.
RE: Loctite on Structural Bolt?
RE: Loctite on Structural Bolt?
RE: Loctite on Structural Bolt?
RE: Loctite on Structural Bolt?
RE: Loctite on Structural Bolt?
Here is the report: Link
www.SlideRuleEra.net
www.VacuumTubeEra.net
RE: Loctite on Structural Bolt?
RE: Loctite on Structural Bolt?
RE: Loctite on Structural Bolt?
www.SlideRuleEra.net
www.VacuumTubeEra.net
RE: Loctite on Structural Bolt?
Yea, Red Loctite is pretty tough stuff to remove. On cars and motorcycles, it usually requires heat.
RE: Loctite on Structural Bolt?
If you use a strain based pretension in method, like turn of the nut then this concern probably isn't an issue.
RE: Loctite on Structural Bolt?