Part Number
Part Number:
NSN:
NIIN:
Item Name:
SCREW , ADJUSTING , VALVE TAPPET
Definition:
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.
CAGE Information
| Code | Company |
|---|---|
| 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMS |
Federal Supply Class
Title
GASOLINE RECIPROCATING ENGINES,
Inclusions:
INCLUDES GAS RECIPROCATING ENGINES; ALL GASOLINE RECIPROCATING ENGINES EXCEPT AIRCRAFT PRIME MOVING.
Exclusions:
EXCLUDES ENGINE ACCESSORIES (FSC 2990).
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| ABUJ | THREAD SIZE | 3/8-24 |
| AETC | METALLIC HARDNESS RATING | NOT RATED |
| BZRR | THREAD SERIES | UNF |
| MATL | MATERIAL | STEEL |
| AAJD | THREAD CLASS | 3A |
| AYTY | SMALLEST DIAMETER | 0.276 INCHES MINIMUM AND 0.281 INCHES MAXIMUM |
| ABPA | UNDERCUT DIAMETER | 0.311 INCHES MINIMUM AND 0.316 INCHES MAXIMUM |
| ABHP | OVERALL LENGTH | 1.875 INCHES NOMINAL |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AAZT | SLOT DEPTH | 0.062 INCHES NOMINAL |
| BNKG | END LARGEST DIAMETER | 0.621 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| ABPC | UNDERCUT WIDTH | 0.078 INCHES NOMINAL |
| AXMB | END LENGTH | 0.375 INCHES NOMINAL |
| AASG | CASEHARDENING INDICATOR | CASEHARDENED |
| STYL | STYLE DESIGNATOR | SPHERICAL HEAD, UNDERCUT, SLOT DRIVE |
| BQTD | END SPHERICAL RADIUS | ANY ACCEPTABLE |
| ABET | THREAD LENGTH | 1.376 INCHES |
| ABGC | SLOT WIDTH | ANY ACCEPTABLE |