This is a wire-rope type of cable which is attached to the crane's boom tip and spools off the reeling drum that measures the boom extension through the turning of the timing belt to the extension pot
NSN 5996-01-032-5926
NSN 5950-01-242-2809
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NSN 5910-01-273-0918
NSN 5925-01-038-4066
NSN 5950-00-475-7920
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NSN 2925-01-338-7126
NSN 7035-01-049-6776
NSN 6240-00-159-4403
NSN 2925-00-801-8456