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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
80064 NAVAL SHIP SYSTEMS COMMAND

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
CYAW SCREW MATERIAL DOCUMENT AND CLASSIFICATION QQ-N-281,CL A FED SPEC 1ST MATERIAL RESPONSE OR QQ-N-281,CL B FED SPEC 2ND MATERIAL RESPONSE
ABQZ INTERNAL DRIVE STYLE SLOT
ZZZT NONDEFINITIVE SPEC/STD DATA 1 TYPE AND 2S STYLE
AASL HEAD DIAMETER 0.244 INCHES MINIMUM AND 0.279 INCHES MAXIMUM
ZZZX DEPARTURE FROM CITED DESIGNATOR AS MODIFIED BY MATERIAL
AAJF THREAD DIRECTION RIGHT-HAND
AASK HEAD STYLE FLAT COUNTERSUNK
AASB FASTENER LENGTH 0.500 INCHES NOMINAL
CYAU SCREW MATERIAL NICKEL ALLOY 400 OR NICKEL ALLOY R-405
THSD THREAD SERIES DESIGNATOR UNC
AAJD THREAD CLASS 2A
CRSQ COUNTERSINK ANGLE 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
AASA THREAD LENGTH 0.438 INCHES MINIMUM AND 0.500 INCHES MAXIMUM
CMLP THREAD QUANTITY PER INCH 32
AHYM NOMINAL THREAD DIAMETER 0.138 INCHES

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