What it is
AN6 hex head bolt, machine, aircraft (AN3 THRU AN20), Hex head, 3/8 -24 UNF-3A, shank (A dia) .374-.371", grip 7-5/16" (±1/64), length 7-61/64" (+1/32 -1/64) (AN3 THRU AN20 Rev. 12 sheet 2)
Equivalents
  • NASM3THRUNASM20NASCatalog onlySame NSN 5306-00-151-2070 (government catalog). Not a maker's approval: confirm on the drawing.

+2 more reference numbers in the detail below.

Install tooling, by who made the part
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Reference only: the drawing and its process spec govern. How to read this

Full detail: decode, cited documents, every stock number