Quote Originally Posted by Bruce_in_Oz View Post
NOTE! For spares, qualify between 9deg and 13deg in advance of new component. Thus ALL replacement bolt-heads as first issued, have a built-in allowance for the gun-plumber to "fit " it to an already fitted bolt body and/or allow for thread-wear inside that bolt body.
I had a #5 that you had to fight the bolt to get the head to rotate enough to remove...suggesting it had never been fitted at all. It would be so tight that you needed a screwdriver to break it loose to lock it down when assembling. Now I get it...