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Part Number

Part Number:
NSN:
NIIN:
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
AASA THREAD LENGTH 10.0 MILLIMETERS NOMINAL
CSYM SURFACE FINISH 0.8 MICROMETERS THREADS
MATT MATERIAL STEEL COMP E4340 OVERALL OR STEEL COMP 8740 OVERALL
AASK HEAD STYLE UNDERCUT HEXAGON
CQBC MINIMUM TENSILE STRENGTH 1100 MEGAPASCALS
AAJF THREAD DIRECTION RIGHT-HAND
AATB WIDTH BETWEEN FLATS 9.78 MILLIMETERS MINIMUM AND 10.00 MILLIMETERS MAXIMUM
ANEE GRIP LENGTH 7.80 MILLIMETERS MINIMUM AND 8.20 MILLIMETERS MAXIMUM
CQFM HARDNESS RATING 36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL
MDCL MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OVERALL AND MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OVERALL
CQWR EXTERNAL THREAD TOLERANCE CLASS 6G
THSD THREAD SERIES DESIGNATOR MJ
ZZZK SPECIFICATION/STANDARD DATA 80205-NA0036 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
AASB FASTENER LENGTH 21.7 MILLIMETERS MINIMUM AND 22.3 MILLIMETERS MAXIMUM
CQQR THREAD PITCH IN MILLIMETERS 1.0
AHYM NOMINAL THREAD DIAMETER 6.0 MILLIMETERS
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416 TY2 CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
CSYM SURFACE FINISH 0.8 MICROMETERS BEARING SURFACE OF HEAD
SFTT SURFACE TREATMENT CADMIUM OVERALL AND CHROMATE OVERALL
AASU HEAD HEIGHT 3.2 MILLIMETERS MINIMUM
CSYM SURFACE FINISH 0.8 MICROMETERS GRIP
AAUR GRIP DIAMETER 6.8 MILLIMETERS MINIMUM AND 7.2 MILLIMETERS MAXIMUM

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