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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
97539 A P M HEXSEAL CORPORATION

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AASA THREAD LENGTH 0.250 INCHES MAXIMUM
AASU HEAD HEIGHT 0.097 INCHES NOMINAL
CYAU SCREW MATERIAL STEEL
ABQZ INTERNAL DRIVE STYLE CROSS RECESS TYPE 1
AASB FASTENER LENGTH 0.250 INCHES NOMINAL
AAJF THREAD DIRECTION RIGHT-HAND
AASK HEAD STYLE WATERTIGHT
THSD THREAD SERIES DESIGNATOR UNC
AAJD THREAD CLASS 2A
CYBA SCREW SURFACE TREATMENT OXIDE
FEAT SPECIAL FEATURES FURNISHED W/ONE SILICONE O RING TO MEET MIL-R-25988
CMLP THREAD QUANTITY PER INCH 32
AASL HEAD DIAMETER 0.294 INCHES NOMINAL
AHYM NOMINAL THREAD DIAMETER 0.138 INCHES

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