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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
1W025 NORTHROP GRUMMAN SYSTEMS CORPORATION

Federal Supply Class

Title

BOLTS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
ANEE GRIP LENGTH 0.178 INCHES MINIMUM AND 0.198 INCHES MAXIMUM
MATT MATERIAL TITANIUM ALLOY UNS R56400 OVERALL
THSD THREAD SERIES DESIGNATOR UNJF
AAJD THREAD CLASS 3A
AASU HEAD HEIGHT 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM
AHYM NOMINAL THREAD DIAMETER 0.250 INCHES
CMLP THREAD QUANTITY PER INCH 28
CSYM SURFACE FINISH 63.0 MICROINCHES GRIP
AASB FASTENER LENGTH 0.489 INCHES MINIMUM AND 0.519 INCHES MAXIMUM
AASA THREAD LENGTH 0.316 INCHES NOMINAL
AAJF THREAD DIRECTION RIGHT-HAND
CSYM SURFACE FINISH 63.0 MICROINCHES BEARING SURFACE OF HEAD
AASK HEAD STYLE DISHED HEXAGON
AATB WIDTH BETWEEN FLATS 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM
AAUR GRIP DIAMETER 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
MDCL MATERIAL DOCUMENT AND CLASSIFICATION AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL

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