Part Number
Part Number:
NSN:
NIIN:
Item Name:
SCREW , MACHINE
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 |
| 21450 |
ARMY WEAPONS COMMAND ATTN AMSWE-REE- |
Characteristics (Decoded)
| MRC |
Requirements Statement |
Clear Text Reply |
| CYAU |
SCREW MATERIAL |
STEEL |
| CYAU |
SCREW MATERIAL |
STEEL |
| ABQZ |
INTERNAL DRIVE STYLE |
CROSS RECESS TYPE 1 |
| AASA |
THREAD LENGTH |
1.250 INCHES MAXIMUM |
| AAJF |
THREAD DIRECTION |
RIGHT-HAND |
| CMLP |
THREAD QUANTITY PER INCH |
14 |
| THSD |
THREAD SERIES DESIGNATOR |
UNC |
| AAJD |
THREAD CLASS |
2A |
| AASK |
HEAD STYLE |
HEXAGON |
| AASU |
HEAD HEIGHT |
0.272 INCHES MINIMUM AND 0.291 INCHES MAXIMUM |
| CYAW |
SCREW MATERIAL DOCUMENT AND CLASSIFICATION |
SAE GR 1 OR 2 ASSN STD SINGLE MATERIAL RESPONSE |
| AHYM |
NOMINAL THREAD DIAMETER |
0.438 INCHES |
| CQFM |
HARDNESS RATING |
95.5 ROCKWELL B MINIMUM AND 100.0 ROCKWELL B MAXIMUM |
| CQBC |
MINIMUM TENSILE STRENGTH |
55000 POUNDS PER SQUARE INCH |
| AATB |
WIDTH BETWEEN FLATS |
0.612 INCHES MINIMUM AND 0.625 INCHES MAXIMUM |
| AASB |
FASTENER LENGTH |
1.250 INCHES NOMINAL |
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