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 |
|---|---|
| 81348 | FEDERAL SPECIFICATIONS PROMULGATED B |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| ZZZK | SPECIFICATION/STANDARD DATA | 81348-FF-S-92 GOVERNMENT SPECIFICATION |
| AASL | HEAD DIAMETER | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM |
| AASB | FASTENER LENGTH | 0.812 INCHES MINIMUM |
| ABQZ | INTERNAL DRIVE STYLE | SLOT |
| AAWD | SECOND DIAMETER FROM HEAD | 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM |
| AAJD | THREAD CLASS | 3A |
| CSNG | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 1 |
| AASU | HEAD HEIGHT | 0.105 INCHES NOMINAL |
| AASA | THREAD LENGTH | 0.812 INCHES MINIMUM |
| MATT | MATERIAL | STEEL COMP 8735 OVERALL OR STEEL COMP 8630 OVERALL OR STEEL COMP 4130 OVERALL OR STEEL COMP 8740 OVERALL |
| AASK | HEAD STYLE | BINDING |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| ZZZT | NONDEFINITIVE SPEC/STD DATA | I TYPE AND 8S STYLE |
| AAWJ | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.618 INCHES NOMINAL |
| AHYM | NOMINAL THREAD DIAMETER | 0.112 INCHES |
| AAWC | FIRST DIAMETER FROM HEAD | 0.138 INCHES MINIMUM AND 0.142 INCHES MAXIMUM |
| AAWH | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.547 INCHES NOMINAL |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6758 MIL SPEC 1ST MATERIAL RESPONSE OVERALL OR MIL-S-6050 MIL SPEC 2ND MATERIAL RESPONSE OVERALL OR MIL-S-6098 MIL SPEC 3RD MATERIAL RESPONSE OVERALL OR MIL-S-6049 MIL SPEC 4TH MATERIAL RESPONSE OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNC |
| CQBC | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH |
| FEAT | SPECIAL FEATURES | SCREW, EXTERNALLY RELIEVED BODY, STEEL, CAD PLD, SAE-AMS-S-6758 MATL, 4-40 NC 3A X 13/16, 0.240-0.260 IN. DIA OF HEAD, 0.105 IN. HEIGHT OF HEAD; 0.194 IN. THD LG; 0.138-0.142 IN. FIRST DIA FRM HEAD; 0.070-080IN. SECOND DIA FROM HEAD; 0.547 IN. FROM HEAD TO END OF FIRST DIA; 0.618 IN. FROM HD TO END OF SECOND DIA.; SPEC APPLIES EXCEPT AS INDICATED |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL |
| CMLP | THREAD QUANTITY PER INCH | 40 |