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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
04729 UNICORP

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AAWC FIRST DIAMETER FROM HEAD 0.073 INCHES MINIMUM AND 0.083 INCHES MAXIMUM
AASB FASTENER LENGTH 0.437 INCHES NOMINAL
ABQZ INTERNAL DRIVE STYLE SLOT
AASA THREAD LENGTH 0.187 INCHES NOMINAL
MATT MATERIAL STEEL COMP 303 OVERALL
AASK HEAD STYLE FILLISTER
AASU HEAD HEIGHT 0.070 INCHES MINIMUM AND 0.078 INCHES MAXIMUM
CSNG EXTERNALLY RELIEVED BODY DIAMETER QUANTITY 1
AAJF THREAD DIRECTION RIGHT-HAND
AHYM NOMINAL THREAD DIAMETER 0.112 INCHES
MDCL MATERIAL DOCUMENT AND CLASSIFICATION ASTM A582 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
AASL HEAD DIAMETER 0.166 INCHES MINIMUM AND 0.182 INCHES MAXIMUM
THSD THREAD SERIES DESIGNATOR UNC
AAJD THREAD CLASS 2A
AAWH DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SFTT SURFACE TREATMENT PASSIVATE OVERALL
CMLP THREAD QUANTITY PER INCH 40

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