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Part Number

Part Number:
NSN:
NIIN:
Item Name:
SCREW , EXTERNALLY RELIEVED BODY

Definition:

AN EXTERNALLY THREADED FASTENER WHOSE THREADED PORTION IS OF ONE NOMINAL DIAMETER, AND WHOSE UNTHREADED PORTION HAS BEEN MACHINED OR GROUND IN ONE OR MORE PLACES OR OVER ITS ENTIRE LENGTH TO A MAXIMUM DIAMETER LESS THAN THE MINIMUM PITCH DIAMETER OF THE THREAD (EXCLUDES UNDERCUT FOR THREAD RELIEF). IT IS NO. 0 (0.060 IN.) (1.5 MM) OR LARGER, AND IS DESIGNED TO BE HELD OR DRIVEN WITH EITHER A WRENCH OR INSERTED DRIVER (EXCLUDING INTERNAL SOCKET AND MULTIPLE SPLINE TYPES) OR BOTH IN SIZES BELOW NO. 10 (0.190 IN.) (5 MM) AND LARGER SIZES MUST HAVE A HEAD DESIGNED FOR ANY TYPE INSERTED DRIVER (EXCLUDING INTERNAL SOCKET AND 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. SEE ALSO BOLT, EXTERNALLY RELIEVED BODY AND BOLT, INTERNAL WRENCHING.

CAGE Information

Code Company
98897 LOCKHEED MARTIN CORPORATION DBA LOCK

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AASA THREAD LENGTH 0.282 INCHES MINIMUM AND 0.285 INCHES MAXIMUM
AASA THREAD LENGTH 0.282 INCHES MINIMUM AND 0.285 INCHES MAXIMUM
AAWC FIRST DIAMETER FROM HEAD 0.355 INCHES MINIMUM AND 0.365 INCHES MAXIMUM
MATT MATERIAL STEEL CORROSION RESISTING OVERALL
AASL HEAD DIAMETER 1.000 INCHES NOMINAL
AASB FASTENER LENGTH 0.300 INCHES NOMINAL
AASU HEAD HEIGHT 0.160 INCHES NOMINAL
AAJD THREAD CLASS 3A
MDCL MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-5000,COND E4 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
CSNG EXTERNALLY RELIEVED BODY DIAMETER QUANTITY 1
AAUB HOLE DIAMETER 0.480 INCHES NOMINAL
AAJF THREAD DIRECTION RIGHT-HAND
AASK HEAD STYLE FLAT CHAMFER
THSD THREAD SERIES DESIGNATOR UNF
AAWH DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER 0.150 INCHES MINIMUM AND 0.180 INCHES MAXIMUM
ASXK HOLE QUANTITY 4
AHYM NOMINAL THREAD DIAMETER 0.438 INCHES
BQDM HOLE TYPE DRILLED
CMLP THREAD QUANTITY PER INCH 20
CRHC HOLE CONFIGURATION STYLE ROUND CHORD

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