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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
80020 NAVAL AIR WARFARE CENTER AIRCRAFT DI

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
ABQZ INTERNAL DRIVE STYLE SLOT
MATT MATERIAL STEEL COMP 303 OVERALL
AASK HEAD STYLE FILLISTER
AASA THREAD LENGTH 0.312 INCHES MINIMUM
CSNG EXTERNALLY RELIEVED BODY DIAMETER QUANTITY 1
AAJF THREAD DIRECTION RIGHT-HAND
AHYM NOMINAL THREAD DIAMETER 0.164 INCHES
AASB FASTENER LENGTH 1.250 INCHES MINIMUM
AAWH DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER 0.938 INCHES NOMINAL
AAWC FIRST DIAMETER FROM HEAD 0.125 INCHES MINIMUM AND 0.131 INCHES MAXIMUM
ASXK HOLE QUANTITY 1
THSD THREAD SERIES DESIGNATOR UNC
AAJD THREAD CLASS 2A
MDCL MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-52263 COND A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
AAUB HOLE DIAMETER 0.046 INCHES NOMINAL
BQDM HOLE TYPE DRILLED
CRHC HOLE CONFIGURATION STYLE ROUND
CMLP THREAD QUANTITY PER INCH 32
SFTT SURFACE TREATMENT PASSIVATE OVERALL
AASL HEAD DIAMETER 0.250 INCHES MINIMUM AND 0.270 INCHES MAXIMUM
AASU HEAD HEIGHT 0.106 INCHES MINIMUM AND 0.113 INCHES MAXIMUM

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