A pulley with grooves and pockets shaped to accommodate the links of a load chain. There is a positive connection between the item and the chain.
NSN 6240-00-400-7980
NSN 6320-01-170-4068
NSN 6135-01-544-8463
NSN 5905-01-016-6821
NSN 5960-01-187-0392
NSN 5960-00-763-5390
NSN 5975-01-569-6623
NSN 5915-01-416-6402
NSN 6320-01-237-9746
NSN 6240-01-327-2449
NSN 6130-00-922-0952
NSN 4140-00-640-6608