Part Number
Part Number:
NSN:
NIIN:
Item Name:
SCREW , EXTERNALLY RELIEVED BODY
Definition:
AN EXTERNALLY THREADED FASTENER WHOSE THREADED PORTION IS OF ONE NOMINAL DIAMETER, AND WHOSE UNTHREADED PORTION HAS BEEN MACHINED OR GROUND IN ONE OR MORE PLACES OR OVER ITS ENTIRE LENGTH TO A MAXIMUM DIAMETER LESS THAN THE MINIMUM PITCH DIAMETER OF THE THREAD (EXCLUDES UNDERCUT FOR THREAD RELIEF). IT IS NO. 0 (0.060 IN.) (1.5 MM) OR LARGER, AND IS DESIGNED TO BE HELD OR DRIVEN WITH EITHER A WRENCH OR INSERTED DRIVER (EXCLUDING INTERNAL SOCKET AND MULTIPLE SPLINE TYPES) OR BOTH IN SIZES BELOW NO. 10 (0.190 IN.) (5 MM) AND LARGER SIZES MUST HAVE A HEAD DESIGNED FOR ANY TYPE INSERTED DRIVER (EXCLUDING INTERNAL SOCKET AND 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. SEE ALSO BOLT, EXTERNALLY RELIEVED BODY AND BOLT, INTERNAL WRENCHING.
CAGE Information
| Code |
Company |
| 18876 |
U S ARMY AVIATION AND MISSILE COMMAN |
Characteristics (Decoded)
| MRC |
Requirements Statement |
Clear Text Reply |
| AASK |
HEAD STYLE |
KNURLED NO. 4 |
| ABQZ |
INTERNAL DRIVE STYLE |
SLOT |
| AAWD |
SECOND DIAMETER FROM HEAD |
0.177 INCHES MINIMUM AND 0.185 INCHES MAXIMUM |
| MATT |
MATERIAL |
STEEL COMP 303 OVERALL |
| AHYM |
NOMINAL THREAD DIAMETER |
0.250 INCHES |
| STDC |
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION |
171,FINISH NO. 5.4.1 MIL STD SINGLE TREATMENT RESPONSE OVERALL |
| AAJF |
THREAD DIRECTION |
RIGHT-HAND |
| AASB |
FASTENER LENGTH |
0.870 INCHES NOMINAL |
| AASU |
HEAD HEIGHT |
0.440 INCHES NOMINAL |
| CSNG |
EXTERNALLY RELIEVED BODY DIAMETER QUANTITY |
2 |
| AAWC |
FIRST DIAMETER FROM HEAD |
0.295 INCHES MINIMUM AND 0.306 INCHES MAXIMUM |
| AAWJ |
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER |
0.440 INCHES NOMINAL |
| AASA |
THREAD LENGTH |
0.430 INCHES MINIMUM |
| THSD |
THREAD SERIES DESIGNATOR |
UNC |
| AAJD |
THREAD CLASS |
2A |
| AASL |
HEAD DIAMETER |
0.557 INCHES MINIMUM AND 0.570 INCHES MAXIMUM |
| AAWH |
DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER |
0.060 INCHES NOMINAL |
| CMLP |
THREAD QUANTITY PER INCH |
20 |
| SFTT |
SURFACE TREATMENT |
PASSIVATE OVERALL |
| MDCL |
MATERIAL DOCUMENT AND CLASSIFICATION |
QQ-S-764,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
Similar Parts