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Item Name:
SCREW , MACHINE

Definition:

AN EXTERNALLY THREADED FASTENER WHOSE THREADED PORTION IS OF ONE NOMINAL DIAMETER, NO 0 (0.060 IN./1.5 MM) OR LARGER, DESIGNED TO BE HELD OR DRIVEN WITH EITHER A WRENCH OR AN INSERTED DRIVER OR BOTH (EXCLUDING INTERNAL SOCKET OR INTERNAL MULTIPLE SPLINE TYPES), IN SIZES BELOW NO. 10 (0.190 IN./5 MM). NO. 10 AND LARGER SIZES MUST HAVE A HEAD DESIGNED FOR ANY TYPE INSERTED DRIVER (EXCLUDING INTERNAL SOCKET OR INTERNAL 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. EXCLUDES BOLT, CLEVIS; BOLT, EXTERNALLY RELIEVED BODY; SCREW, EXTERNALLY RELIEVED BODY; AND SCREW, ASSEMBLED WASHER. SEE ALSO, SCREW, INSTRUMENT; BOLT, MACHINE; BOLT, INTERNAL WRENCHING; AND SCREW, CAP SOCKET HEAD.

CAGE Information

Code Company
21450 ARMY WEAPONS COMMAND ATTN AMSWE-REE-

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AHYM NOMINAL THREAD DIAMETER 0.250 INCHES
AHYM NOMINAL THREAD DIAMETER 0.250 INCHES
CMLP THREAD QUANTITY PER INCH 28
ABQZ INTERNAL DRIVE STYLE CROSS RECESS TYPE 1
AAJF THREAD DIRECTION RIGHT-HAND
AASK HEAD STYLE FLAT COUNTERSUNK
THSD THREAD SERIES DESIGNATOR UNF
CYBA SCREW SURFACE TREATMENT CADMIUM OR ZINC
AAJD THREAD CLASS 2A
AASA THREAD LENGTH 2.000 INCHES NOMINAL
CRSQ COUNTERSINK ANGLE 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
CYAU SCREW MATERIAL STEEL COMP 1010 OR STEEL COMP 1011 OR STEEL COMP 1016 OR STEEL COMP 1019 OR STEEL COMP 1015 OR STEEL COMP 1018 OR STEEL COMP 1020
AASB FASTENER LENGTH 2.000 INCHES NOMINAL
ZZZT NONDEFINITIVE SPEC/STD DATA 2C STYLE AND 3 TYPE
CYAW SCREW MATERIAL DOCUMENT AND CLASSIFICATION QQ-S-633 FED SPEC ALL MATERIAL RESPONSES
AASL HEAD DIAMETER 0.477 INCHES MINIMUM AND 0.507 INCHES MAXIMUM

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