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NSN: 5306-00-001-8925
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Cross Reference These part numbers have the same form, fit, and function of 20807

Item Number Cage
20807 81142
1075-2032 F1978

Characteristic Codes 20807 spec. code meanings

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.
CBBL Those features, not otherwise specified, which may be required for proper functioning of the item.
ANEE A measurement of the longest dimension of the grip, in distinction from width.
AASU A measurement from the bottom to the top of the head, in distinction from depth.
AASK The style designation indicating the configuration that most nearly corresponds to the appearance of the head.
MATT The chemical compound or mechanical mixture properties of which the item is fabricated.
AHYM The nominal length of a straight line which passes through the center of the threaded portion, and terminates at the circumference.
AAJD A numeric-alpha designator indicating the pitch diameter tolerance and an external or internal thread.
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.

20807 Machine Bolt

Mfr. Cage F1978

Specification

Fastener Length: 7/8", Thread: 1/2-14, Thread Length: 3/4"

AASB Fastener Length
0.875 inches
CBBL Features Provided
Finished head
ANEE Grip Length
0.187 inches maximum
AASU Head Height
From 0.272" and 0.291"
AASK Head Style
Hexagon
MATT Material
Steel
AHYM Nominal Thread Diameter
0.438 inches
AATB Width Between Flats
From 0.612" and 0.625"
AAJD Thread Class
3a
AAJF Thread Direction
Right-hand
AASA Thread Length
0.688 inches minimum
CMLP Thready Qty Per Inch (tpi)
14
THSD Thread Series Designator
Unc

Technical Definition

Bolt, Machine, also referenced with federal logistics item name code 01847 - An externally threaded fastener designed for insertion through holes in assembled parts and normally intended to be tightened or released by torquing a nut. the threaded and unthreaded portions are both of one nominal diameter of 0.190 inch (5 mm) or larger. the head is not designed to be held or driven with an inserted driver or by the thumb and fingers. a locking feature may be incorporated in the design of the head or threads. head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. for items having a grip length portion machined to a tolerance of 0.0015 inch (0.038 mm) or less, bolt, shear. see also screw, cap, hexagon head and screw, machine.
National Stock Number (NSN) 5306-00-001-8925

Last Modified: 02/14/2017