MIL-B-11837 Revision C, October 6, 1983
BLOCKS,TACKLE,WIRE ROPE,SNATCH,EXTRA HEAVY DUTY
Includes all amendments and changes through Cancellation Notice 1, August 27, 1999
Additional Comments: CNCL S/S BY A-A-59390
The specification covers single- and double-sheaved, manual- and self-locking snatch blocks.
Blocks shall be the following types, as specified (see 6.2).
Type I - Manual locking. Type II - Self locking.