Used on route clearance - common nsn - legacy jerrv 6x6 and cougar 4x4 and 1 other weapon system including 21n - nuclear reactors program. right-hand 16 thread quantity per inch shroud nut , conical top the top of the nut is compressed to form an oval-shaped locking zone. provides a 360 degree locking zone. nuts twist freely on a bolt or stud until they makecontact with the locking zone.then they expand to an almost circular shape creating locking compression. flange diameter is .828"
