As differentiated by 0.875 in wirerope size, quadruple block
A mechanical device, consisting of a pulley(s) or sheave(s) encased in a shell or frame which may be provided with a means such as a hook, eye, strap, screw, etc., by which it may be attached to an object. It is used to change direction of a running rope and/or to gain a mechanical advantage.
Classification: Pulley tackle and hoists, other than skip hoists or hoists of a kind used for raising vehicles, not powered by electric motor
NSN 5915-01-182-1365
NSN 6135-00-299-6918
NSN 5960-00-197-6282
NSN 6620-01-549-3559
NSN 6650-01-144-0617
NSN 6130-01-569-3746
NSN 5925-00-284-3726
NSN 5975-01-622-9012
NSN 5905-00-942-7338
NSN 5975-01-528-0811
NSN 6105-01-455-3721
NSN 6650-00-349-0939