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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
06540 NEW HAVEN MFG CORP AMATOM ELECTRONIC

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AASK HEAD STYLE KNURLED NO. 1
AAUY POINT LENGTH 0.187 INCHES NOMINAL
ABQZ INTERNAL DRIVE STYLE SLOT
MATT MATERIAL STEEL COMP 303 OVERALL
AAVA POINT DIAMETER 0.175 INCHES NOMINAL
ABQJ POINT STYLE CONE
CSNG EXTERNALLY RELIEVED BODY DIAMETER QUANTITY 1
AHYM NOMINAL THREAD DIAMETER 0.250 INCHES
CMLP THREAD QUANTITY PER INCH 28
AAJF THREAD DIRECTION RIGHT-HAND
AASU HEAD HEIGHT 0.547 INCHES MINIMUM AND 0.578 INCHES MAXIMUM
AASL HEAD DIAMETER 0.495 INCHES MINIMUM AND 0.505 INCHES MAXIMUM
THSD THREAD SERIES DESIGNATOR UNF
AAWH DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM
CWDK POINT CHAMFER ANGLE 85.0 DEGREES MINIMUM AND 95.0 DEGREES MAXIMUM
AAJD THREAD CLASS 2A
AAWC FIRST DIAMETER FROM HEAD 0.170 INCHES MINIMUM AND 0.180 INCHES MAXIMUM
MDCL MATERIAL DOCUMENT AND CLASSIFICATION QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
AASA THREAD LENGTH 0.302 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
AASB FASTENER LENGTH 1.359 INCHES MINIMUM AND 1.391 INCHES MAXIMUM
SFTT SURFACE TREATMENT PASSIVATE OVERALL

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