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Part Number

Part Number:
NSN:
NIIN:
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
57730 MACHIDA INCORPORATED DBA VISION-SCIE

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AASL HEAD DIAMETER 8.0 MILLIMETERS NOMINAL
AASA THREAD LENGTH 18.6 MILLIMETERS MINIMUM AND 20.0 MILLIMETERS MAXIMUM
AASU HEAD HEIGHT 3.1 MILLIMETERS NOMINAL
CQFM HARDNESS RATING 63.0 ROCKWELL B MINIMUM AND 88.0 ROCKWELL B MAXIMUM
ABQZ INTERNAL DRIVE STYLE CROSS RECESS TYPE 1
AHYM NOMINAL THREAD DIAMETER 4.0 MILLIMETERS
AASB FASTENER LENGTH 20.0 MILLIMETERS NOMINAL
AAJF THREAD DIRECTION RIGHT-HAND
CQWR EXTERNAL THREAD TOLERANCE CLASS 6G
CQQR THREAD PITCH IN MILLIMETERS 0.7
CQBC MINIMUM TENSILE STRENGTH 56000 POUNDS PER SQUARE INCH
THSD THREAD SERIES DESIGNATOR M
CYBA SCREW SURFACE TREATMENT ZINC
AASK HEAD STYLE PAN
CYAU SCREW MATERIAL STEEL PROPERTY CLASS 4.8 OR STEEL PROPERTY CLASS 5.8

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