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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
K7766 BRITISH STANDARDS INSTITUTION

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AASA THREAD LENGTH 0.300 INCHES MINIMUM
AASA THREAD LENGTH 0.300 INCHES MINIMUM
AATB WIDTH BETWEEN FLATS 0.245 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
AAJD THREAD CLASS 3A
CYAU SCREW MATERIAL STEEL
AAJF THREAD DIRECTION RIGHT-HAND
AASU HEAD HEIGHT 0.075 INCHES MINIMUM AND 0.085 INCHES MAXIMUM
THSD THREAD SERIES DESIGNATOR UNC
AASK HEAD STYLE HEXAGON
CQBC MINIMUM TENSILE STRENGTH 110000 POUNDS PER SQUARE INCH
CYBA SCREW SURFACE TREATMENT CADMIUM
CMLP THREAD QUANTITY PER INCH 32
AASB FASTENER LENGTH 0.450 INCHES MINIMUM AND 0.490 INCHES MAXIMUM
AHYM NOMINAL THREAD DIAMETER 0.138 INCHES

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