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National Stock Number:
2810-00-118-7256
Federal Supply Class:
2810
National Item Identification Number:
001187256
Description:
SCREW,ADJUSTING,VALVE TAPPET
Detail:
AN EXTERNALLY THREADED SCREW-LIKE DEVICE WITH A HEXAGON, SQUARE, SLOTTED OR ANY OTHER TYPE DRIVE END. THE OTHER END MAY HAVE A SPHERICAL BALL, SOCKET OR OTHER TYPE OF MACHINED SURFACE. IT MAY HAVE A CONCENTRIC HOLE ALONG THE LONGITUDINAL CENTERLINE AND A HOLE PERPENDICULAR TO THE AXIS JOINING THE CONCENTRIC HOLE FOR LUBRICATION. IT IS SPECIFICALLY DESIGNED TO BE USED AS A MEANS FOR ADJUSTING ENGINE POPPET VALVE TAPPET CLEARANCES AND MAY BE FURNISHED WITH A LOCK NUT.
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Manufacturer Information:
| 94399 | 00198 | PRATT & WHITNEY CANADA CORP | | 94399 | 77445 | RTX CORPORATION |
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Techincal Specification:
| CASEHARDENING INDICATOR | NOT CASEHARDENED | | END LARGEST DIAMETER | 0.688 INCHES NOMINAL | | END LENGTH | 0.157 INCHES NOMINAL | | END SPHERICAL RADIUS | 0.031 INCHES NOMINAL | | FSC APPLICATION DATA | ACFT ENG R2800 | | OVERALL LENGTH | 1.280 INCHES NOMINAL | | MATERIAL | STEEL | | METALLIC HARDNESS RATING | 26.0 MINIMUM ROCKWELL C AND 30.0 MAXIMUM ROCKWELL C | | SLOT DEPTH | 0.031 INCHES NOMINAL | | SLOT WIDTH | 0.047 INCHES NOMINAL | | SMALLEST DIAMETER | 0.047 INCHES NOMINAL | | STYLE DESIGNATOR | SPHERICAL HEAD, STRAIGHT THREAD, SLOT DRIVE | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.123 INCHES | | THREAD SIZE | 1/4-28 | | THREAD SERIES | UNF |
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