National Item Identification Number
00-891-2172
008912172
3940-00-891-2172
3940008912172
National Stock Number
Item Name
BLOCK,TACKLE
Federal Supply Class
3940
Description
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.
Commercial and Government Entity Code (Supplier Data)
99696
Reference Numbers (Part Numbers)
341N400-501-105
Required Categories
STYLE DESIGNATOR
SHEAVE OUTSIDE DIAMETER
CENTER PIN DIAMETER
BLOCK TYPE
MATE
Required Description
25 HALF-STRAP PATTERN
10.000 INCHES NOMINAL
0.874 INCHES MINIMUM AND
0.885 IN