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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
CRZS DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER 0.646 INCHES NOMINAL FIRST HOLE
CMLP THREAD QUANTITY PER INCH 24
THSD THREAD SERIES DESIGNATOR UNJF
AAUB HOLE DIAMETER 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416, TY II, CL 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
AASU HEAD HEIGHT 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM
AAJD THREAD CLASS 3A
AASA THREAD LENGTH 0.454 INCHES NOMINAL
AASB FASTENER LENGTH 0.829 INCHES NOMINAL
AAJF THREAD DIRECTION RIGHT-HAND
ASXK HOLE QUANTITY 3
MATT MATERIAL STEEL OVERALL
AAUR GRIP DIAMETER 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM
AASK HEAD STYLE HEXAGON
CRHC HOLE CONFIGURATION STYLE HEXAGON FLATS
AATB WIDTH BETWEEN FLATS 0.3729 INCHES MINIMUM AND 0.3735 INCHES MAXIMUM
AAWB SHANK UNTHREADED HOLE DIAMETER 0.106 INCHES MINIMUM FIRST HOLE AND 0.116 INCHES MAXIMUM FIRST HOLE
ZZZK SPECIFICATION/STANDARD DATA 80205-NAS6206 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
BQDM HOLE TYPE DRILLED
AHYM NOMINAL THREAD DIAMETER 0.375 INCHES
SFTT SURFACE TREATMENT CADMIUM OVERALL AND CHROMATE OVERALL
ANEE GRIP LENGTH 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM

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