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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
ZZZT NONDEFINITIVE SPEC/STD DATA I TYPE AND 2S STYLE
ZZZT NONDEFINITIVE SPEC/STD DATA I TYPE AND 2S STYLE
CYAU SCREW MATERIAL STEEL COMP 303SE
CYAW SCREW MATERIAL DOCUMENT AND CLASSIFICATION QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE
FEAT SPECIAL FEATURES 0.030 IN. N BY 0.020 IN. DEEP UNDERCUT ADJACENT TO HEAD
AASL HEAD DIAMETER 0.263 INCHES MINIMUM AND 0.279 INCHES MAXIMUM
AAJD THREAD CLASS 3A
AASB FASTENER LENGTH 0.310 INCHES NOMINAL
ABQZ INTERNAL DRIVE STYLE CROSS RECESS TYPE 1
AAJF THREAD DIRECTION RIGHT-HAND
AASK HEAD STYLE FLAT COUNTERSUNK
THSD THREAD SERIES DESIGNATOR UNC
CRSQ COUNTERSINK ANGLE 80.0 DEGREES MINIMUM AND 82.0 DEGREES MAXIMUM
AASA THREAD LENGTH 0.310 INCHES MAXIMUM
CMLP THREAD QUANTITY PER INCH 32
AHYM NOMINAL THREAD DIAMETER 0.138 INCHES
ZZZK SPECIFICATION/STANDARD DATA 81348-FF-S-92B GOVERNMENT SPECIFICATION

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