Jam nut is a locking device in which
(A) A smaller nut is tightened against main nut creating friction at the contacting surface
(B) A split pin is passed through diametrically opposite slots in nut and a hole in bolt and the two ends of split pin are
separated and bent back on nut
(C) A slot is cut in the middle of nut along the length and a cap screw is provided to tighten the two parts of nut
separated by slot
(D) An elastic piece is tightened in the nut by a setscrew
(A) A smaller nut is tightened against main nut creating friction at the contacting surface
(B) A split pin is passed through diametrically opposite slots in nut and a hole in bolt and the two ends of split pin are
separated and bent back on nut
(C) A slot is cut in the middle of nut along the length and a cap screw is provided to tighten the two parts of nut
separated by slot
(D) An elastic piece is tightened in the nut by a setscrew