is the use of commercially available threadlocker (i.e. loctite blue) legal for use in securing nuts and bolts?
R20 and use of threadlockers
Commercially-available threadlocker, including Loctite blue, is made legal for limited uses by clause F of rule <R15>:
Mechanical fasteners may be secured using Loctite or a similar thread-locking product. This may ONLY be used for securing hardware, such as screws and nuts.