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National Stock Number:
3940-00-468-8521
Federal Supply Class:
3940
National Item Identification Number:
004688521
Description:
BLOCK,TACKLE
Detail:
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.
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Manufacturer Information:
| 216-381 | 81316 | PORTSMOUTH NAVAL SHIPYARD | | 544535 | 80064 | NAVAL SHIP SYSTEMS COMMAND |
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Techincal Specification:
| STYLE DESIGNATOR | ROUND PATTERN | | SHEAVE OUTSIDE DIAMETER | 12.500 INCHES NOMINAL | | CENTER PIN DIAMETER | 1.497 INCHES NOMINAL | | BLOCK TYPE | REGULAR | | MATERIAL AND LOCATION | MANGANESE BRONZE SHEAVE AND | | STEEL SHELL AND | | STEEL BEARING | | SURFACE TREATMENT AND LOCATION | GALVANIZED OVERALL | | SHEAVE QUANTITY | 1 | | TACKLE ACCOMMODATED TYPE | WIRE ROPE | | MAXIMUM TACKLE DIAMETER ACCOMMODATED | 0.750 INCHES | | TACKLE LOCKING DEVICE | NOT INCLUDED | | ANTITOPPLING DEVICE | NOT INCLUDED | | ATTACHMENT STYLE | STIFF, UPSET SWIVEL SHACKLE |
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