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. IT HAS A ROUND UNTHREADED NECK OR SHANK ALL OR PART OF WHICH IS OF GREATER DIAMETER THAN THE THREADED PORTION. THE HEAD IS DESIGNED TO BE DRIVEN WITH EITHER A WRENCH OR AN INSERTED DRIVER OR BOTH IN SIZES BELOW NO. 10 (0.190 IN.) (5 MM) NOMINAL DIAMETER. NO. 10 (0.190 IN.) (5 MM) AND LARGER SIZES MUST BE DESIGNED FOR ANY TYPE OF INSERTED DRIVER, BUT MAY ALSO PROVIDE FOR EXTERNAL WRENCHING OF THE HEAD. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS. FOR ITEMS WHICH ARE BOTH SHOULDERED AND HAVE AN EXTERNALLY RELIEVED BODY, USE SCREW, EXTERNALLY RELIEVED BODY. FOR ITEMS WITH A NO. 10 (0.190 IN.) (5 MM) OR LARGER THREAD DIAMETER WITHOUT AN INSERTED DRIVER HEAD, USE BOLT, SHOULDER. EXCLUDES BOLT, INTERNAL WRENCHING AND SCREW, CAP, SOCKET HEAD.
CAGE Information
| Code | Company |
|---|---|
| U1604 | MARTIN-BAKER AIRCRAFT CO LTD |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| ABQZ | INTERNAL DRIVE STYLE | SLOT |
| AASK | HEAD STYLE | FILLISTER |
| AATX | SHOULDER LENGTH | 0.090 INCHES MINIMUM FIRST SHOULDER AND 0.110 INCHES MAXIMUM FIRST SHOULDER |
| CWYB | SHOULDER SHAPE | ROUND FIRST SHOULDER |
| AASU | HEAD HEIGHT | 0.040 INCHES NOMINAL |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| MATT | MATERIAL | STEEL OVERALL |
| THSD | THREAD SERIES DESIGNATOR | UNC |
| AAJD | THREAD CLASS | 2A |
| FEAT | SPECIAL FEATURES | ITEM TO BE COATED WITH BLUE MARKING DYE AFTER APPLICATION OF FINISH TO IDENTIFY UNC THD |
| AASL | HEAD DIAMETER | 0.307 INCHES MINIMUM AND 0.317 INCHES MAXIMUM |
| CMLP | THREAD QUANTITY PER INCH | 32 |
| AASB | FASTENER LENGTH | 0.335 INCHES MINIMUM AND 0.345 INCHES MAXIMUM |
| AATN | SHOULDER DIAMETER | 0.182 INCHES MINIMUM FIRST SHOULDER AND 0.192 INCHES MAXIMUM FIRST SHOULDER |
| AHYM | NOMINAL THREAD DIAMETER | 0.138 INCHES |
| SFTT | SURFACE TREATMENT | CADMIUM OVERALL |
| AASA | THREAD LENGTH | 0.160 INCHES MINIMUM AND 0.185 INCHES MAXIMUM |