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NSN: 5306-00-001-7867
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Cross Reference

These part numbers have the same form, fit, and function of 71392-4-4
Item Number Cage
8448974 19204
71392-4-4 56878

Characteristic Codes

71392-4-4 spec. code meanings
Code Translation
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.
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.
ABQZ The style designation indicating the configuration that most nearly corresponds to the appearance of the internal drive.
AHYM The nominal length of a straight line which passes through the center of the threaded portion, and terminates at the circumference.
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.


Description: Internal Wrenching Bolt
Mfr. Cage 56878


Thread Length: 1/2", Fastener Length: 3/4", Thread: 1/4-20

AAJF Thread Direction
AASA Thread Length
0.500 inches minimum
AASB Fastener Length
0.750 inches
ABQZ Internal Drive Style
AHYM Nominal Thread Diameter
0.250 inches
CMLP Thready Qty Per Inch (tpi)
THSD Thread Series Designator

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.
National Stock Number (NSN): 5306-00-001-7867

Last Modified: 02/14/2017