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Part Number

Part Number:
NSN:
NIIN:
Item Name:
BOLT , MACHINE

Definition:

AN EXTERNALLY THREADED FASTENER DESIGNED FOR INSERTION THROUGH HOLES IN ASSEMBLED PARTS AND NORMALLY INTENDED TO BE TIGHTENED OR RELEASED BY TORQUING A NUT. THE THREADED AND UNTHREADED PORTIONS ARE BOTH OF ONE NOMINAL DIAMETER OF 0.190 INCH (5 MM) OR LARGER. THE HEAD IS NOT DESIGNED TO BE HELD OR DRIVEN WITH AN INSERTED DRIVER OR BY THE THUMB AND FINGERS. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS. HEAD DIMENSIONS AND SIZES OF THREADED AND UNTHREADED PORTIONS SHALL CONFORM TO INTERNATIONALLY RECOGNIZED FASTENER STANDARDS. FOR ITEMS HAVING A GRIP LENGTH PORTION MACHINED TO A TOLERANCE OF 0.0015 INCH (0.038 MM) OR LESS, BOLT, SHEAR. SEE ALSO SCREW, CAP, HEXAGON HEAD AND SCREW, MACHINE.

CAGE Information

Code Company
81349 MILITARY SPECIFICATIONS PROMULGATED

Federal Supply Class

Title

BOLTS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
ZZZX DEPARTURE FROM CITED DESIGNATOR AS MODIFIED BY THD LENGTH
ZZZX DEPARTURE FROM CITED DESIGNATOR AS MODIFIED BY THD LENGTH
MDCL MATERIAL DOCUMENT AND CLASSIFICATION SAE GR 8 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
AHYM NOMINAL THREAD DIAMETER 0.500 INCHES
AAJF THREAD DIRECTION RIGHT-HAND
CQFM HARDNESS RATING 32.0 ROCKWELL C MINIMUM OVERALL AND 38.0 ROCKWELL C MAXIMUM OVERALL
MATT MATERIAL STEEL OVERALL
AASB FASTENER LENGTH 1.375 INCHES NOMINAL
AASA THREAD LENGTH 0.875 INCHES MINIMUM
THSD THREAD SERIES DESIGNATOR UNC
AAJD THREAD CLASS 2A
ZZZT NONDEFINITIVE SPEC/STD DATA 2 TYPE AND 8 GRADE
AASK HEAD STYLE HEXAGON
CQBC MINIMUM TENSILE STRENGTH 150000 POUNDS PER SQUARE INCH
AATB WIDTH BETWEEN FLATS 0.725 INCHES MINIMUM AND 0.750 INCHES MAXIMUM
AASU HEAD HEIGHT 0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM
CBBL FEATURES PROVIDED UNFINISHED HEAD
ANEE GRIP LENGTH 0.500 INCHES NOMINAL
CMLP THREAD QUANTITY PER INCH 13

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