Part Number
Part Number:
NSN:
NIIN:
Item Name:
SCREW , MACHINE
Definition:
AN EXTERNALLY THREADED FASTENER WHOSE THREADED PORTION IS OF ONE NOMINAL DIAMETER, NO 0 (0.060 IN./1.5 MM) OR LARGER, DESIGNED TO BE HELD OR DRIVEN WITH EITHER A WRENCH OR AN INSERTED DRIVER OR BOTH (EXCLUDING INTERNAL SOCKET OR INTERNAL MULTIPLE SPLINE TYPES), IN SIZES BELOW NO. 10 (0.190 IN./5 MM). NO. 10 AND LARGER SIZES MUST HAVE A HEAD DESIGNED FOR ANY TYPE INSERTED DRIVER (EXCLUDING INTERNAL SOCKET OR INTERNAL MULTIPLE SPLINE TYPES), BUT MAY ALSO BE DESIGNED FOR EXTERNAL WRENCHING. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS. EXCLUDES BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; AND SCREW, ASSEMBLED WASHER. SEE ALSO, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; AND SCREW, CAP SOCKET HEAD.
CAGE Information
| Code |
Company |
| 88044 |
AERONAUTICAL STANDARDS GROUP DEPT OF |
Characteristics (Decoded)
| MRC |
Requirements Statement |
Clear Text Reply |
| AASL |
HEAD DIAMETER |
0.287 INCHES MINIMUM AND 0.309 INCHES MAXIMUM |
| AASL |
HEAD DIAMETER |
0.287 INCHES MINIMUM AND 0.309 INCHES MAXIMUM |
| ABQZ |
INTERNAL DRIVE STYLE |
SLOT |
| CYAU |
SCREW MATERIAL |
STEEL |
| AASB |
FASTENER LENGTH |
0.250 INCHES NOMINAL |
| AAJF |
THREAD DIRECTION |
RIGHT-HAND |
| AHYM |
NOMINAL THREAD DIAMETER |
0.164 INCHES |
| AASK |
HEAD STYLE |
ROUND |
| AASU |
HEAD HEIGHT |
0.107 INCHES MINIMUM AND 0.120 INCHES MAXIMUM |
| THSD |
THREAD SERIES DESIGNATOR |
UNC |
| AAJD |
THREAD CLASS |
2A |
| ZZZT |
NONDEFINITIVE SPEC/STD DATA |
1 TYPE AND 1S STYLE |
| CYBA |
SCREW SURFACE TREATMENT |
CADMIUM |
| CMLP |
THREAD QUANTITY PER INCH |
32 |
| AASA |
THREAD LENGTH |
0.250 INCHES NOMINAL |
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