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Externally Relieved Body Bolt

Model / MPN: 14448-A | NSN: 5306-01-121-9769
ITAR Registered seal

An externally threaded fastener whose threaded portion is of one diameter, and whose unthreaded portion has been machined or ground in one or more places or over its entire length to a diameter less than the pitch diameter of the thread (excludes undercuts for thread relief). It is no. 10 (0.190 in.) (5 mm) or larger in size and has a head which is not designed to be held or driven with an inserted driver or designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. Excludes bolt, internal wrenching and thumbscrew. See also screw, externally relieved body.

Product Details
NATO Stock Number
Sold in multiples of
1 EA
Thread Class
Thread Direction
Thread Length
3.750 inches
Fastener Length
11.500 inches
Head Style
Hexagon extended washer
Head Height
3.375 inches
Width Between Flats
3.375 inches
Extended Washer Diameter
4.938 inches
Extended Washer Thickness
1.000 inches
First Diameter From Head
3.531 inches
Distance From Largest Bearing Surface Of Head To End Of First Diameter
4.625 inches
End Application
Used on propeller hub onboard 378 ft whec coast guard vessels
Thread Diameter
3.500 inches
Thready Qty Per Inch (tpi)
Externally Relieved Body Diameter Quantity
Thread Series Designator

Pricing and Availability

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14448-A Cross Reference
  • 14485-D PIECE 22