The length of the AN aircraft bolts are measured from under the head to the end of the shank. The grip is the unthreaded area of the shank. Undrilled for stop nut application.
The length of the AN aircraft bolts are measured from under the head to the end of the shank. The grip is the unthreaded area of the shank. Undrilled for stop nut application.
A or no A? AN bolts were originally designed to be used with a castle nut and cotter pin, so the base part number indicates a drilled shank. The addition of an "A" at the end (for example, AN6H-20A) indicates an undrilled shank for use with a self-locking nut.