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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
81348 FEDERAL SPECIFICATIONS PROMULGATED B

Federal Supply Class

Title

SCREWS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
AASU HEAD HEIGHT 0.023 INCHES MINIMUM AND 0.033 INCHES MAXIMUM
AASU HEAD HEIGHT 0.023 INCHES MINIMUM AND 0.033 INCHES MAXIMUM
ABQZ INTERNAL DRIVE STYLE SLOT
AASL HEAD DIAMETER 0.120 INCHES MINIMUM AND 0.130 INCHES MAXIMUM
AASK HEAD STYLE BINDING
AAJF THREAD DIRECTION RIGHT-HAND
AASB FASTENER LENGTH 0.109 INCHES MINIMUM AND 0.141 INCHES MAXIMUM
THSD THREAD SERIES DESIGNATOR UNF
AHYM NOMINAL THREAD DIAMETER 0.060 INCHES
AAJD THREAD CLASS 2A
CMLP THREAD QUANTITY PER INCH 80
CYAU SCREW MATERIAL STEEL COMP 304 OR STEEL COMP 316 OR STEEL COMP 302 OR STEEL COMP 303SE
AASA THREAD LENGTH 0.084 INCHES MINIMUM AND 0.141 INCHES MAXIMUM

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