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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
80205 NATIONAL AEROSPACE STANDARDS COMMITT

Federal Supply Class

Title

BOLTS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
ZZZK SPECIFICATION/STANDARD DATA 80205-NAS1264 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
AAJD THREAD CLASS 3A
ANEE GRIP LENGTH 1.615 INCHES MINIMUM AND 1.635 INCHES MAXIMUM
AHYM NOMINAL THREAD DIAMETER 0.875 INCHES
CRZS DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER 2.118 INCHES MINIMUM FIRST HOLE AND 2.168 INCHES MAXIMUM FIRST HOLE
CSYM SURFACE FINISH 16.0 MICROINCHES THREADS
CSYM SURFACE FINISH 63.0 MICROINCHES GRIP
AAWB SHANK UNTHREADED HOLE DIAMETER 0.141 INCHES MINIMUM FIRST HOLE AND 0.151 INCHES MAXIMUM FIRST HOLE
AAJF THREAD DIRECTION RIGHT-HAND
CMLP THREAD QUANTITY PER INCH 14
AATB WIDTH BETWEEN FLATS 1.239 INCHES MINIMUM AND 1.252 INCHES MAXIMUM
AASU HEAD HEIGHT 0.438 INCHES MINIMUM AND 0.453 INCHES MAXIMUM
CSYM SURFACE FINISH 63.0 MICROINCHES BEARING SURFACE OF HEAD
THSD THREAD SERIES DESIGNATOR UNF
MDCL MATERIAL DOCUMENT AND CLASSIFICATION NAS621,COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL
AASK HEAD STYLE HEXAGON
AASB FASTENER LENGTH 2.262 INCHES MINIMUM AND 2.292 INCHES MAXIMUM
MATT MATERIAL TITANIUM ALLOY UNS R54520 OVERALL
AAUR GRIP DIAMETER 0.8735 INCHES MINIMUM AND 0.8740 INCHES MAXIMUM
AASA THREAD LENGTH 0.627 INCHES MINIMUM AND 0.677 INCHES MAXIMUM

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