Part Number
Part Number:
NSN:
NIIN:
Item Name:
THUMBSCREW
Definition:
AN EXTERNALLY THREADED FASTENER WHOSE THREADED PORTION IS OF ONE NOMINAL DIAMETER. IT MAY HAVE AN UNTHREADED PORTION WITH A DIAMETER LESS THAN, EQUAL TO, OR GREATER THAN THE DIAMETER OF THE THREADED PORTION. IT HAS EITHER A VERTICALLY FLATTENED, CIRCULAR KNURLED, OR WING TYPE HEAD, ALL OF WHICH ARE DESIGNED FOR ROTATION BY THE THUMB AND FINGERS. FOR ITEMS HAVING WRENCHING FACILITIES SUCH AS SOCKET RECESS, MULTIPLE SPLINE OR SLOT HEADS, USE SCREW (AS MODIFIED) OR BOLT (AS MODIFIED).
CAGE Information
| Code | Company |
|---|---|
| 04939 | LOCKHEED MARTIN CORPORATION DBA LOCK |
Federal Supply Class
Title
SCREWS
Inclusions:
Exclusions:
Characteristics (Decoded)
| MRC | Requirements Statement | Clear Text Reply |
|---|---|---|
| AAWC | FIRST DIAMETER FROM HEAD | 0.500 INCHES NOMINAL |
| AHYM | NOMINAL THREAD DIAMETER | 0.190 INCHES |
| AAWH | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER | 0.170 INCHES NOMINAL |
| AASK | HEAD STYLE | KNURLED NO. 4 |
| AAWD | SECOND DIAMETER FROM HEAD | 0.138 INCHES NOMINAL |
| AAJD | THREAD CLASS | 3A |
| ABQJ | POINT STYLE | FLAT |
| AAJF | THREAD DIRECTION | RIGHT-HAND |
| MDCL | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5646 ASSN STD 1ST MATERIAL RESPONSE OVERALL OR ASTM A582 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| AAWJ | DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF SECOND DIAMETER | 0.620 INCHES MINIMUM AND 0.650 INCHES MAXIMUM |
| CSNG | EXTERNALLY RELIEVED BODY DIAMETER QUANTITY | 2 |
| AASA | THREAD LENGTH | 0.180 INCHES NOMINAL |
| THSD | THREAD SERIES DESIGNATOR | UNF |
| MATT | MATERIAL | STEEL COMP 347 OVERALL OR STEEL COMP 303 OVERALL |
| CMLP | THREAD QUANTITY PER INCH | 32 |
| AASL | HEAD DIAMETER | 0.750 INCHES NOMINAL |
| AASB | FASTENER LENGTH | 0.970 INCHES MINIMUM AND 1.000 INCHES MAXIMUM |
| AASU | HEAD HEIGHT | 0.400 INCHES NOMINAL |