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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
ANEE GRIP LENGTH 2.490 INCHES MINIMUM AND 2.510 INCHES MAXIMUM
ZZZK SPECIFICATION/STANDARD DATA 80205-NAS1262 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
AHYM NOMINAL THREAD DIAMETER 0.625 INCHES
THSD THREAD SERIES DESIGNATOR UNJF
CMLP THREAD QUANTITY PER INCH 18
AAJD THREAD CLASS 3A
AASU HEAD HEIGHT 0.312 INCHES MINIMUM AND 0.327 INCHES MAXIMUM
CSYM SURFACE FINISH 16.0 MICROINCHES THREADS
AASB FASTENER LENGTH 3.028 INCHES MINIMUM AND 3.058 INCHES MAXIMUM
AAUR GRIP DIAMETER 0.6235 INCHES MINIMUM AND 0.6240 INCHES MAXIMUM
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
CSYM SURFACE FINISH 63.0 MICROINCHES BEARING SURFACE OF HEAD
AASK HEAD STYLE HEXAGON
AATB WIDTH BETWEEN FLATS 0.928 INCHES MINIMUM AND 0.940 INCHES MAXIMUM
MATT MATERIAL TITANIUM ALLOY OVERALL
MDCL MATERIAL DOCUMENT AND CLASSIFICATION NAS621 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CRZS DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER 2.894 INCHES MINIMUM FIRST HOLE AND 2.944 INCHES MAXIMUM FIRST HOLE
AASA THREAD LENGTH 0.518 INCHES MINIMUM AND 0.568 INCHES MAXIMUM

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