Part Number
Definition:
AN EXTERNALLY THREADED FASTENER WHOSE THREADED PORTION IS OF ONE NOMINAL DIAMETER, NO 0 (0.060 IN./1.5 MM) OR LARGER, DESIGNED TO BE HELD OR DRIVEN WITH EITHER A WRENCH OR AN INSERTED DRIVER OR BOTH (EXCLUDING INTERNAL SOCKET OR INTERNAL MULTIPLE SPLINE TYPES), IN SIZES BELOW NO. 10 (0.190 IN./5 MM). NO. 10 AND LARGER SIZES MUST HAVE A HEAD DESIGNED FOR ANY TYPE INSERTED DRIVER (EXCLUDING INTERNAL SOCKET OR INTERNAL 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. EXCLUDES BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; AND SCREW, ASSEMBLED WASHER. SEE ALSO, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; AND SCREW, CAP SOCKET HEAD.
CAGE Information
| Code | Company |
|---|---|
| 80205 | NATIONAL AEROSPACE STANDARDS COMMITT |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| AASA | THREAD LENGTH | 0.526 INCHES NOMINAL |
| CFSG | NONSTANDARD THREAD PITCH DIAMETER | +0.2460/+0.2490 INCHES |
| THSD | THREAD SERIES DESIGNATOR | UNJF |
| FEAT | SPECIAL FEATURES | NON MAGNETIC, LOW STRENGTH, PHILLIPS RECESS, .2500 DIAMETER SCREW, 2.000 GRIP |
| CYAW | SCREW MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763, CLASS 304, 321 OR 347, CONDITION A FED SPEC SINGLE MATERIAL RESPONSE OR ANSI/ASTM-A 493, TYPE 384 ASSN STD 1ST MATERIAL RESPONSE |
| AAJD | THREAD CLASS | 3A |
| AHYM | NOMINAL THREAD DIAMETER | 0.250 INCHES |
| CMLP | THREAD QUANTITY PER INCH | 28 |
| ABQZ | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| AASK | HEAD STYLE | FLAT COUNTERSUNK |
| CRSQ | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM |
| AASB | FASTENER LENGTH | 2.526 INCHES NOMINAL |
| AASL | HEAD DIAMETER | 0.496 INCHES MINIMUM AND 0.510 INCHES MAXIMUM |
| CYAU | SCREW MATERIAL | STEEL CORROSION RESISTING |