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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
81996 U S ARMY AVIATION AND MISSILE COMMAN

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
MATT MATERIAL STEEL COMP 8740 OVERALL OR STEEL COMP 4130 OVERALL OR STEEL COMP 4037 OVERALL
AASK HEAD STYLE FILLISTER
AAJD THREAD CLASS 3A
CSNG EXTERNALLY RELIEVED BODY DIAMETER QUANTITY 1
ABQZ INTERNAL DRIVE STYLE CROSS RECESS TYPE 1
AAJF THREAD DIRECTION RIGHT-HAND
AAWH DISTANCE FROM LARGEST BEARING SURFACE OF HEAD TO END OF FIRST DIAMETER 1.200 INCHES NOMINAL
SFTT SURFACE TREATMENT CADMIUM OVERALL AND CHROMATE OVERALL AND CHROMIUM OVERALL
AASL HEAD DIAMETER 0.208 INCHES MINIMUM AND 0.226 INCHES MAXIMUM
AAWC FIRST DIAMETER FROM HEAD 0.113 INCHES MINIMUM AND 0.123 INCHES MAXIMUM
THSD THREAD SERIES DESIGNATOR UNC
AASA THREAD LENGTH 1.000 INCHES MINIMUM
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416 TYPE 2,CLASS 2 FED SPEC 1ST TREATMENT RESPONSE OVERALL AND MIL-P-6871 TYPE 2,CLASS A MIL SPEC 2ND TREATMENT RESPONSE OVERALL
CQFM HARDNESS RATING 20.0 ROCKWELL C MINIMUM OVERALL AND 24.0 ROCKWELL C MAXIMUM OVERALL
CMLP THREAD QUANTITY PER INCH 32
AASB FASTENER LENGTH 2.200 INCHES NOMINAL
AASU HEAD HEIGHT 0.085 INCHES MINIMUM AND 0.093 INCHES MAXIMUM
AHYM NOMINAL THREAD DIAMETER 0.138 INCHES

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