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National Stock Number:
3940-00-877-5715
Federal Supply Class:
3940
National Item Identification Number:
008775715
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:
| 6028259 | 80091 | NAVAL FACILITIES ENGINEERING COMMAND | | MIL-L-28654 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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Techincal Specification:
| STYLE DESIGNATOR | ROUND PATTERN | | SHELL LENGTH | 36.250 INCHES NOMINAL | | SHEAVE OUTSIDE DIAMETER | 34.000 INCHES NOMINAL | | CENTER PIN DIAMETER | 4.247 INCHES MINIMUM AND | | 4.250 INCHES MAXIMUM | | BLOCK TYPE | SNATCH | | LOCKING STYLE | SAFETY LOCKING | | MATERIAL AND LOCATION | BRONZE, MIL-B-16261, GRADE 6-CANCELED BEARING | | STEEL, MIL-S-890, ALLOY NO. 4 CENTER PIN | | STEEL, MIL-S-15083, GRADE 80-40 SHEAVE | | STEEL, MIL-S-22698 SHELL | | SURFACE TREATMENT AND LOCATION | ZINC, ELECTROLYTIC OVERALL | | SHEAVE QUANTITY | 1 | | BEARING TYPE | PLAIN | | SHEAVE BEARING LUBRICATION METHOD | PRESSURE GREASE FITTING | | TACKLE ACCOMMODATED TYPE | WIRE ROPE | | MAXIMUM TACKLE DIAMETER ACCOMMODATED | 2.000 INCHES | | TACKLE LOCKING DEVICE | NOT INCLUDED | | ANTITOPPLING DEVICE | NOT INCLUDED | | ATTACHMENT STYLE | OBLONG SWIVEL EYE | | MAXIMUM LOAD RATING | 151740.0 POUNDS | | SPECIAL FEATURES | W/LATCH PIN AND DRILLED CROSSHEAD FOR SECURING SIDE IN CLOSED POSITION | | NONDEFINITIVE SPEC/STD DATA | 2 GROUP | | SPEC/STD CONTROLLING DATA | | | MANUFACTURERS CODE | 81349 | | NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-L-28654 |
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