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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
53711 NAVAL SEA SYSTEMS COMMAND

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
FEAT SPECIAL FEATURES ALTERED FROM MS51958-81 BY ADDITION OF A HIGH PURITY ALUMINUM COATING AND A FLUOROPOLYMER SURFACE TREATMENT
CQBC MINIMUM TENSILE STRENGTH 80000 POUNDS PER SQUARE INCH
AASB FASTENER LENGTH 0.719 INCHES MINIMUM AND 0.750 INCHES MAXIMUM
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
AASL HEAD DIAMETER 0.473 INCHES MINIMUM AND 0.492 INCHES MAXIMUM
CYBA SCREW SURFACE TREATMENT ALUMINUM
AASU HEAD HEIGHT 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM
THSD THREAD SERIES DESIGNATOR UNF
AAJD THREAD CLASS 2A
CYAU SCREW MATERIAL STEEL COMP 304 OR STEEL COMP 316
AASA THREAD LENGTH 0.750 INCHES NOMINAL
CYAW SCREW MATERIAL DOCUMENT AND CLASSIFICATION QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE AND FED.STD.66 FED STD SINGLE MATERIAL RESPONSE
AASK HEAD STYLE PAN

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