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National Stock Number:
3940-00-984-0231
Federal Supply Class:
3940
National Item Identification Number:
009840231
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:
| GGGB00490 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
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Techincal Specification:
| ANTITOPPLING DEVICE | NOT INCLUDED | | ATTACHMENT STYLE | CHAIN SHACKLE | | BEARING TYPE | PLAIN | | BECKET TYPE | THIMBLE | | BECKET QUANTITY | 1 | | BLOCK TYPE | REGULAR | | CENTER PIN DIAMETER | 0.875 INCHES NOMINAL | | LOAD RATING | 20000.0 POUNDS MAXIMUM | | MATERIAL | COPPER ALLOY BEARING | | MATERIAL | IRON AND STEEL SHEAVE | | MATERIAL | STEEL CENTER PIN | | MATERIAL | WOOD SHELL | | MAXIMUM TACKLE DIAMETER ACCOMMODATED | 1.750 INCHES | | NONDEFINITIVE SPEC/STD DATA | 2 TYPE | | SHELL LENGTH | 14.000 INCHES NOMINAL | | SHEAVE BEARING LUBRICATION METHOD | SELF-LUBRICATED | | SHEAVE OUTSIDE DIAMETER | 9.500 INCHES NOMINAL | | SHEAVE QUANTITY | 3 | | STYLE DESIGNATOR | HALF-OVAL PATTERN | | SURFACE TREATMENT | LACQUER AND ASPHALT SHELL | | SURFACE TREATMENT | ZINC SHEAVE | | TACKLE ACCOMMODATED TYPE | FIBROUS ROPE | | TACKLE LOCKING DEVICE | NOT INCLUDED |
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