Part Number
Definition:
A SCREW, MACHINE OR SCREW, CAP, SOCKET HEAD WHOSE UNTHREADED PORTION IS OF SPECIFIED GRIP LENGTH, PLATED OR UNPLATED, AND IS MACHINED TO A TOLERANCE OF ONE THOUSANDTH (0.001 IN.) (0.025 MM) OR LESS OF A SPECIFIC DIAMETER FOR ITEMS (1.000 IN.) (25 MM) OR LESS IN DIAMETER. ITEMS OVER (1.000 IN.) (25 MM) IN DIAMETER SHALL HAVE A TOLERANCE OF FIFTEEN TEN THOUSANDTHS (0.0015 IN.) (0.038 MM) OR LESS. THE NOMINAL MAJOR DIAMETER OF THE THREADS SHALL BE AT LEAST ONE THOUSANDTH (0.001 IN.) (0.025 MM) BELOW THE MINIMUM SHANK DIAMETER, BUT NOT BELOW THE MINIMUM MAJOR DIAMETER FOR APPLICABLE CLASS OF FIT, AS SHOWN IN THE SCREW THREAD STANDARDS, FED STD H28 AND/OR OTHER NATIONALLY RECOGNIZED STANDARDS. THE HEAD IS DESIGNED TO BE HELD OR DRIVEN WITH AN INSERTED DRIVER. IT IS NOT DESIGNED FOR ROTATION BY THE THUMB AND FINGERS. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS.
CAGE Information
| Code | Company |
|---|---|
| 78286 | SIKORSKY AIRCRAFT CORPORATION |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| ANEE | GRIP LENGTH | 1.275 INCHES NOMINAL |
| AASU | HEAD HEIGHT | 0.064 INCHES NOMINAL |
| MATT | MATERIAL | STEEL COMP 4130 OVERALL |
| ABQZ | INTERNAL DRIVE STYLE | SLOT |
| AASA | THREAD LENGTH | 0.256 INCHES MAXIMUM |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL AND CADMIUM OVERALL AND CHROMATE OVERALL OR PHOSPHATE OVERALL OR CADMIUM OVERALL OR OXIDE OVERALL |
| AASK | HEAD STYLE | FILLISTER |
| AASB | FASTENER LENGTH | 1.531 INCHES NOMINAL |
| AAJD | THREAD CLASS | 3A |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| CSYM | SURFACE FINISH | 100.0 MICROINCHES OVERALL |
| AASL | HEAD DIAMETER | 0.188 INCHES NOMINAL |
| THSD | THREAD SERIES DESIGNATOR | UNC |
| CQBC | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH |
| AHYM | NOMINAL THREAD DIAMETER | 0.125 INCHES |
| AAUR | GRIP DIAMETER | 0.1245 INCHES MINIMUM AND 0.1247 INCHES MAXIMUM |
| CMLP | THREAD QUANTITY PER INCH | 40 |
| CQFM | HARDNESS RATING | 26.0 ROCKWELL C MINIMUM OVERALL AND 33.0 ROCKWELL C MAXIMUM OVERALL |