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Part Number:
NSN:
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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
06725 SPS TECHNOLOGIES LLC DBA AIR INDUSTR

Federal Supply Class

Title

BOLTS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
CSYM SURFACE FINISH 32.0 MICROINCHES THREADS
AAWB SHANK UNTHREADED HOLE DIAMETER 0.141 INCHES MINIMUM THREADS AND 0.151 INCHES MAXIMUM THREADS
AASB FASTENER LENGTH 3.403 INCHES MINIMUM AND 3.433 INCHES MAXIMUM
AHYM NOMINAL THREAD DIAMETER 0.625 INCHES
CMLP THREAD QUANTITY PER INCH 18
AAJD THREAD CLASS 3A
SFTT SURFACE TREATMENT CADMIUM HEAD
SFTT SURFACE TREATMENT CHROMIUM GRIP
AASU HEAD HEIGHT 0.312 INCHES MINIMUM AND 0.327 INCHES MAXIMUM
CSYM SURFACE FINISH 63.0 MICROINCHES GRIP
CRZS DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER 3.294 INCHES NOMINAL THREADS
AAJF THREAD DIRECTION RIGHT-HAND
CQFM HARDNESS RATING 36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL
SFTT SURFACE TREATMENT CADMIUM THREADS
CSYM SURFACE FINISH 63.0 MICROINCHES BEARING SURFACE OF HEAD
THSD THREAD SERIES DESIGNATOR UNF
AASA THREAD LENGTH 0.543 INCHES NOMINAL
AATB WIDTH BETWEEN FLATS 0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM
AASK HEAD STYLE DISHED HEXAGON
MATT MATERIAL STEEL COMP 4140 OVERALL OR STEEL COMP 4340 OVERALL OR STEEL COMP 8740 OVERALL OR STEEL COMP 8735 OVERALL OR STEEL COMP 6150 OVERALL
ANEE GRIP LENGTH 2.865 INCHES MINIMUM AND 2.885 INCHES MAXIMUM
AAUR GRIP DIAMETER 0.6230 INCHES MINIMUM AND 0.6240 INCHES MAXIMUM
SFTT SURFACE TREATMENT CHROMIUM PRIMARY WASHER

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