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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
88044 AERONAUTICAL STANDARDS GROUP DEPT OF

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AHYM NOMINAL THREAD DIAMETER 0.190 INCHES
AHYM NOMINAL THREAD DIAMETER 0.190 INCHES
AASB FASTENER LENGTH 0.750 INCHES NOMINAL
ABQZ INTERNAL DRIVE STYLE SLOT
ZZZT NONDEFINITIVE SPEC/STD DATA 1 TYPE AND 2S STYLE
CYAU SCREW MATERIAL STEEL
AAJF THREAD DIRECTION RIGHT-HAND
CQBC MINIMUM TENSILE STRENGTH 60000 POUNDS PER SQUARE INCH
AASL HEAD DIAMETER 0.359 INCHES MINIMUM AND 0.385 INCHES MAXIMUM
AASK HEAD STYLE FLAT COUNTERSUNK
THSD THREAD SERIES DESIGNATOR UNF
CYAW SCREW MATERIAL DOCUMENT AND CLASSIFICATION QQ-S-634 FED SPEC SINGLE MATERIAL RESPONSE OR QQ-S-637 FED SPEC SINGLE MATERIAL RESPONSE OR 66 FED STD SINGLE MATERIAL RESPONSE
AASA THREAD LENGTH 0.634 INCHES MINIMUM
AAJD THREAD CLASS 2A
CRSQ COUNTERSINK ANGLE 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
CYBA SCREW SURFACE TREATMENT CADMIUM
CMLP THREAD QUANTITY PER INCH 32

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