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Part Number

Part Number:
NSN:
NIIN:
Item Name:
BOLT , INTERNAL WRENCHING

Definition:

AN EXTERNALLY THREADED FASTENER WHOSE THREADED PORTION IS OF ONE NOMINAL DIAMETER, NO. 10 (0.190 IN.) (5 MM) OR LARGER. IT IS DESIGNED WITH AN INTERNAL SOCKET OR INTERNAL MULTIPLE SPLINE FOR USE WITH AN INTERNAL DRIVER. THE HEAD IS BEVELED (CONICAL) OR CYLINDRICAL IN SHAPE. ITEMS WITH CYLINDRICAL SHAPED HEADS MUST HAVE AN EXTERNALLY RELIEVED BODY. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS. SEE ALSO SCREW, CAP, SOCKET HEAD. EXCLUDES SETSCREW; SCREW, SHOULDER; BOLT, SHOULDER; SCREW, EXTERNALLY RELIEVED BODY; BOLT, EXTERNALLY RELIEVED BODY; AND SCREW, MACHINE.

CAGE Information

Code Company
81348 FEDERAL SPECIFICATIONS PROMULGATED B

Federal Supply Class

Title

BOLTS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
CSYM SURFACE FINISH 32.0 MICROINCHES THREADS
CSYM SURFACE FINISH 32.0 MICROINCHES THREADS
SFTT SURFACE TREATMENT ZINC OVERALL
ASDB WIDTH ACROSS FLATS 0.312 INCHES NOMINAL
AAJD THREAD CLASS 3A
AASA THREAD LENGTH 1.500 INCHES MINIMUM AND 1.810 INCHES MAXIMUM
AAJF THREAD DIRECTION RIGHT-HAND
ZZZT NONDEFINITIVE SPEC/STD DATA 1 TYPE
AASU HEAD HEIGHT 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM
AASL HEAD DIAMETER 0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM
MATT MATERIAL STEEL OVERALL
CMLP THREAD QUANTITY PER INCH 16
THSD THREAD SERIES DESIGNATOR UNC
CQBC MINIMUM TENSILE STRENGTH 170000 POUNDS PER SQUARE INCH
ABQZ INTERNAL DRIVE STYLE HEXAGON
CQFM HARDNESS RATING 36.0 ROCKWELL C MINIMUM OVERALL AND 45.0 ROCKWELL C MAXIMUM OVERALL
AHYM NOMINAL THREAD DIAMETER 0.375 INCHES
AASB FASTENER LENGTH 2.000 INCHES NOMINAL
CQHQ MINIMUM YIELD STRENGTH 150000 POUNDS PER SQUARE INCH

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