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 |
|---|---|
| 81348 | FEDERAL SPECIFICATIONS PROMULGATED B |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| AASU | HEAD HEIGHT | 0.067 INCHES MINIMUM AND 0.087 INCHES MAXIMUM |
| AASL | HEAD DIAMETER | 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM |
| CYAU | SCREW MATERIAL | STEEL COMP 1141 OR STEEL COMP 1137 OR STEEL COMP 1118 OR STEEL COMP 1115 OR STEEL COMP 1050 OR STEEL COMP 1020 OR STEEL COMP 1017 OR STEEL COMP 1016 OR STEEL COMP 1010 OR STEEL COMP 1144 OR STEEL COMP 1151 OR STEEL COMP 1045 OR STEEL COMP 1040 OR STEEL COMP 1035 OR STEEL COMP 1030 OR STEEL COMP 1025 OR STEEL COMP 1211 OR STEEL COMP 1330 OR STEEL COMP 1212 OR STEEL COMP 1095 OR STEEL COMP 1015 OR STEEL COMP 1215 OR STEEL COMP 1008 OR STEEL COMP 12L14 OR STEEL COMP 1019 OR STEEL COMP 1018 OR STEEL COMP 1022 OR STEEL COMP 1213 OR STEEL COMP 1117 OR STEEL COMP 1021 OR STEEL COMP 1548 |
| AASA | THREAD LENGTH | 0.188 INCHES MINIMUM AND 0.250 INCHES MAXIMUM |
| ABQZ | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 |
| AASB | FASTENER LENGTH | 0.250 INCHES NOMINAL |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| CYBE | SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | ASTM B633,TY 1 ASSN STD SINGLE TREATMENT RESPONSE |
| THSD | THREAD SERIES DESIGNATOR | UNC |
| AAJD | THREAD CLASS | 2A |
| CYBA | SCREW SURFACE TREATMENT | ZINC |
| CMLP | THREAD QUANTITY PER INCH | 32 |
| AHYM | NOMINAL THREAD DIAMETER | 0.138 INCHES |
| AASK | HEAD STYLE | PAN |