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Part Number:
NSN:
NIIN:
Item Name:
BOLT , SHEAR

Definition:

A HIGH STRENGTH, 160,000 POUNDS PER SQUARE INCH (1100 MEGAPASCALS) MINIMUM TENSILE STRENGTH EXTERNALLY THREADED FASTENER DESIGNED FOR USE IN APPLICATIONS INVOLVING GREAT SHEAR STRESS. THE HEAD IS DESIGNED TO ACCOMMODATE AN EXTERNAL WRENCH OR DRIVER. 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. THE UNTHREADED PORTION IS OF SPECIFIC 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. A LOCKING FEATURE MAY BE INCORPORATED IN THE DESIGN OF THE HEAD OR THREADS. SEE BOLT, MACHINE AND BOLT, CLEVIS.

CAGE Information

Code Company
97499 BELL HELICOPTER TEXTRON INC.

Federal Supply Class

Title

BOLTS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
CSYM SURFACE FINISH 32.0 MICROINCHES THREADS
CMLP THREAD QUANTITY PER INCH 24
CSYM SURFACE FINISH 32.0 MICROINCHES GRIP
AAUR GRIP DIAMETER 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM
AASA THREAD LENGTH 0.334 INCHES MINIMUM AND 0.384 INCHES MAXIMUM
AASU HEAD HEIGHT 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM
THSD THREAD SERIES DESIGNATOR UNJF
MDCL MATERIAL DOCUMENT AND CLASSIFICATION MIL-S-7838 MIL SPEC ALL MATERIAL RESPONSES OVERALL
CQBC MINIMUM TENSILE STRENGTH 160000 POUNDS PER SQUARE INCH
AAJD THREAD CLASS 3A
MATT MATERIAL STEEL COMP 8740 OVERALL OR STEEL COMP 8735 OVERALL OR STEEL COMP 4140 OVERALL OR STEEL COMP E4340 OVERALL OR STEEL COMP 6150 OVERALL
AAJF THREAD DIRECTION RIGHT-HAND
CQFM HARDNESS RATING 36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL
CRZS DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER 1.278 INCHES MINIMUM FIRST HOLE AND 1.328 INCHES MAXIMUM FIRST HOLE
CSYM SURFACE FINISH 63.0 MICROINCHES BEARING SURFACE OF HEAD
AASB FASTENER LENGTH 1.469 INCHES MINIMUM AND 1.499 INCHES MAXIMUM
AATB WIDTH BETWEEN FLATS 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM
AASK HEAD STYLE HEXAGON
ANEE GRIP LENGTH 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM
STDC SURFACE TREATMENT DOCUMENT AND CLASSIFICATION QQ-P-416,TYPE 2 CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SFTT SURFACE TREATMENT CADMIUM OVERALL AND CHROMATE OVERALL
AHYM NOMINAL THREAD DIAMETER 0.312 INCHES
AAWB SHANK UNTHREADED HOLE DIAMETER 0.076 INCHES MINIMUM FIRST HOLE AND 0.086 INCHES MAXIMUM FIRST HOLE

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