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Part Number

Part Number:
NSN:
NIIN:
Item Name:
BOLT , RIBBED SHOULDER

Definition:

AN EXTERNALLY THREADED FASTENER WHOSE THREADED PORTION IS OF ONE NOMINAL DIAMETER. IT HAS A SERIES OF LONGITUDINAL RIBS, SPLINES OR SERRATIONS ON ALL OR A PART OF THE SHOULDER. THE MINOR DIAMETER OF THE RIBS MUST BE GREATER THAN THE MAJOR DIAMETER OF THE THREADS. SEE ALSO BOLT, RIBBED NECK.

CAGE Information

Code Company
78500 MERITOR HEAVY VEHICLE SYSTEMS LLC

Federal Supply Class

Title

BOLTS

Inclusions:

Exclusions:

Characteristics (Decoded)

MRC Requirements Statement Clear Text Reply
MATT MATERIAL STEEL COMP 4620H OVERALL OR STEEL COMP 8620H OVERALL OR STEEL COMP 8622 OVERALL OR STEEL COMP 4320H OVERALL OR STEEL COMP 8622H OVERALL OR STEEL COMP 3120 OVERALL OR STEEL COMP 4427 OVERALL
AAVT RIB MINOR DIAMETER 0.945 INCHES NOMINAL
AASL HEAD DIAMETER 1.312 INCHES NOMINAL
CWYB SHOULDER SHAPE ROUND FIRST SHOULDER
AASB FASTENER LENGTH 4.188 INCHES NOMINAL
AAVP RIB MAJOR DIAMETER 1.020 INCHES MINIMUM AND 1.023 INCHES MAXIMUM
CQFM HARDNESS RATING 223.0 BRINELL STANDARD MINIMUM OVERALL AND 227.0 BRINELL STANDARD MAXIMUM OVERALL
AAVR DISTANCE FROM LARGEST DIAMETER OF BEARING SURFACE OF HEAD TO RIBS 0.375 INCHES NOMINAL
AAJF THREAD DIRECTION RIGHT-HAND
AASK HEAD STYLE FLAT CHAMFER
AATX SHOULDER LENGTH 2.688 INCHES NOMINAL FIRST SHOULDER
AASU HEAD HEIGHT 0.312 INCHES NOMINAL
AATN SHOULDER DIAMETER 0.973 INCHES MINIMUM FIRST SHOULDER AND 0.977 INCHES MAXIMUM FIRST SHOULDER
THSD THREAD SERIES DESIGNATOR UNF
AAVQ RIB LENGTH 0.438 INCHES NOMINAL
CMLP THREAD QUANTITY PER INCH 16
AAJD THREAD CLASS 2A
AAVU RIB QUANTITY 36
AHYM NOMINAL THREAD DIAMETER 0.750 INCHES
CBBL FEATURES PROVIDED CASEHARDENED
CRKB RIB INCLUDED ANGLE 90.0 DEGREES NOMINAL
AASA THREAD LENGTH 1.188 INCHES MINIMUM

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