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 |
|---|---|
| 80205 | NATIONAL AEROSPACE STANDARDS COMMITT |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| CSYM | SURFACE FINISH | 32.0 MICROINCHES THREADS |
| STDC | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY2,CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |
| CSYM | SURFACE FINISH | 32.0 MICROINCHES GRIP |
| THSD | THREAD SERIES DESIGNATOR | UNJF |
| AAUR | GRIP DIAMETER | 0.2470 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM |
| ANEE | GRIP LENGTH | 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM |
| CQBC | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH |
| AAJD | THREAD CLASS | 3A |
| AHYM | NOMINAL THREAD DIAMETER | 0.250 INCHES |
| CMLP | THREAD QUANTITY PER INCH | 28 |
| ZZZK | SPECIFICATION/STANDARD DATA | 80205-NAS1221 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| CQFM | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL |
| AASK | HEAD STYLE | FLAT COUNTERSUNK |
| CRSQ | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| AASB | FASTENER LENGTH | 1.286 INCHES MINIMUM AND 1.316 INCHES MAXIMUM |
| MATT | MATERIAL | STEEL COMP 4340 OVERALL OR STEEL COMP 4140 OVERALL OR STEEL COMP 8740 OVERALL |
| ABQZ | INTERNAL DRIVE STYLE | HIGH-TORQUE |
| AASL | HEAD DIAMETER | 0.461 INCHES MINIMUM AND 0.507 INCHES MAXIMUM |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL AND CHROMATE OVERALL |
| AASA | THREAD LENGTH | 0.401 INCHES MINIMUM AND 0.451 INCHES MAXIMUM |