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Part Number

Part Number:
NSN:
NIIN:
Item Name:
BOLT , CLOSE TOLERANCE

Definition:

AN EXTERNALLY THREADED FASTENER WHOSE UNTHREADED PORTION IS OF A SPECIFIED GRIP LENGTH, PLATED OR UNPLATED, AND IS MACHINED TO A TOLERANCE OF ONE THOUSANDTH (0.001) OF AN INCH (0.025 MM) OR LESS OF A SPECIFIC DIAMETER FOR ITEMS ONE INCH (25 MM) OR LESS IN DIAMETER. ITEMS OVER ONE INCH (25 MM) IN DIAMETER SHALL HAVE A TOLERANCE OF FIFTEEN TEN-THOUSANDTHS (0.0015) OF AN INCH (0.038 MM) OR LESS. THE NOMINAL MAJOR DIAMETER OF THE THREADS SHALL BE AT LEAST ONE THOUSANDTH (0.001) OF AN INCH (0.025 MM) BELOW THE MINIMUM SHANK DIAMETER, BUT NOT BELOW THE MINIMUM MAJOR DIAMETER FOR APPLICABLE CLASS OF FIT, AS SHOWN IN THE SCREW THREAD STANDARDS, FED STD H28 AND/OR OTHER NATIONALLY RECOGNIZED STANDARDS. THE HEAD IS NOT DESIGNED TO BE HELD OR DRIVEN WITH AN INSERTED DRIVER, NOR IS IT DESIGNED FOR ROTATION BY THE THUMB AND FINGERS. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS. FOR ITEMS HAVING CLOSE TOLERANCE, AND FABRICATED FROM MATERIAL HAVING 160,000 POUNDS PER SQUARE INCH (1100 MEGAPASCALS) MINIMUM TENSILE STRENGTH, SEE BOLT, SHEAR. FOR ITEMS FABRICATED FROM MATERIAL HAVING LESS THAN 160,000 POUNDS PER SQUARE INCH (1100 MEGAPASCALS) MINIMUM TENSILE STRENGTH AND NOT HAVING A CLOSE TOLERANCE, SEE BOLT, MACHINE.

CAGE Information

Code Company
36659 LOCKHEED MARTIN CORP LOCKHEED MARTIN

Federal Supply Class

Title

BOLTS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
MATT MATERIAL STEEL COMP 4130 OVERALL
MATT MATERIAL STEEL COMP 4130 OVERALL
MDCL MATERIAL DOCUMENT AND CLASSIFICATION SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
AAJD THREAD CLASS 3A
SFTT SURFACE TREATMENT CADMIUM HEAD
AHYM NOMINAL THREAD DIAMETER 0.500 INCHES
AAJF THREAD DIRECTION RIGHT-HAND
SFTT SURFACE TREATMENT CADMIUM THREADS
AASU HEAD HEIGHT 0.125 INCHES NOMINAL
THSD THREAD SERIES DESIGNATOR UNF
ANEE GRIP LENGTH 0.938 INCHES NOMINAL
CQBC MINIMUM TENSILE STRENGTH 125000 POUNDS PER SQUARE INCH
AASK HEAD STYLE HEXAGON
AAWB SHANK UNTHREADED HOLE DIAMETER 0.106 INCHES NOMINAL FIRST HOLE
AAUR GRIP DIAMETER 0.4990 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM
CMLP THREAD QUANTITY PER INCH 20
CRZS DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER 1.188 INCHES NOMINAL FIRST HOLE
CQFM HARDNESS RATING 26.0 ROCKWELL C MINIMUM OVERALL AND 32.0 ROCKWELL C MAXIMUM OVERALL
AASA THREAD LENGTH 0.360 INCHES MINIMUM
AATB WIDTH BETWEEN FLATS 0.740 INCHES MINIMUM AND 0.752 INCHES MAXIMUM
AASB FASTENER LENGTH 1.344 INCHES NOMINAL

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