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NSN: 5306-00-001-7867
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Part Numbers

Item Number Item Description
8448974 Bolt, Internal Wrenching
71392-4-4 Bolt, Internal Wrenching

Master Requirement Codes

Code Translation
AASB The dimension, measured along a line parallel to the longitudinal axis, from the largest bearing surface of the fastener head to the extreme opposite end, or as specifically designated for other type fasteners.
AHYM The nominal length of a straight line which passes through the center of the threaded portion, and terminates at the circumference.
ABQZ The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
AAJF The direction of the thread when viewed axially. a right-hand thread winds in a clockwise direction while a left-hand thread winds in a counterclockwise direction.
AASA A measurement of the extent of threads, including incomplete threads, along a line parallel to the longitudinal axis.
CMLP The number of threads on the item per linear inch measured on a line parallel to the thread axis.
THSD A designation distinguishing one group of thread diameter-pitch combinations from another by the number of threads per measurement scale for a specific diameter.

8448974 Internal Wrenching Bolt

Cage 56878

Technical Definition

Bolt, Internal Wrenching, also referenced with federal logistics item name code 06666 - An externally threaded fastener whose threaded portion is of one nominal diameter, no. 10 (0.190 in.) (5 mm) or larger. it is designed with an internal socket or internal multiple spline for use with an internal driver. the head is beveled (conical) or cylindrical in shape. items with cylindrical shaped heads must have an externally relieved body. a locking feature may be incorporated in the design of the head or threads. see also screw, cap, socket head. excludes setscrew; screw, shoulder; bolt, shoulder; screw, externally relieved body; bolt, externally relieved body; and screw, machine.

Technical Characteristics

Fastener Length (AASB):
0.750 inches nominal
Nominal Thread Diameter (AHYM):
0.250 inches
Internal Drive Style (ABQZ):
Hexagon
Thread Direction (AAJF):
Right-hand
Thread Length (AASA):
0.500 inches minimum
Thread Quantity Per Inch (CMLP):
20
Thread Series Designator (THSD):
Unc

National Stock Number (NSN)

5306-00-001-7867