Part Number
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 |
|---|---|
| 19204 | ARMY UNITED STATES DEPARTMENT OF THE |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| AASL | HEAD DIAMETER | 0.455 INCHES NOMINAL |
| AAWC | FIRST DIAMETER FROM HEAD | 0.200 INCHES NOMINAL |
| AAWH | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.340 INCHES NOMINAL |
| CSNG | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 |
| AHYM | NOMINAL THREAD DIAMETER | 0.250 INCHES |
| CRSQ | COUNTERSINK ANGLE | 83.0 DEGREES MINIMUM AND 85.0 DEGREES MAXIMUM |
| CMLP | THREAD QUANTITY PER INCH | 28 |
| ABQZ | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| MATT | MATERIAL | STEEL COMP 1035 OVERALL |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASK | HEAD STYLE | FLAT COUNTERSUNK |
| AASB | FASTENER LENGTH | 0.500 INCHES NOMINAL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | ASTM A576 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR ASTM A675 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR ASTM A108 ASSN STD SINGLE MATERIAL RESPONSE OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNF |
| CQFM | HARDNESS RATING | 47.0 ROCKWELL C NOMINAL OVERALL |
| AAJD | THREAD CLASS | 2A |
| SFTT | SURFACE TREATMENT | PHOSPHATE OVERALL |
| AASA | THREAD LENGTH | 0.160 INCHES MINIMUM |