What it is
AN174 close tolerance hex head bolt (AN173 THRU AN186), Hex head, close tolerance, .2500-28 UNF-3A, shank (A dia) .2492-.2487", grip .938" (±.016), length 1.406" (+.031 -.016 as printed) (AN173 THRU AN186 Rev. 7 sheet 3, Table II)
Equivalents
No equivalent on file: no maker document names one and the government catalog lists none on its stock number.
Install tooling, by who made the part
Not documented for this part number. Ask a tooling specialist →

Reference only: the drawing and its process spec govern. How to read this

Full detail: decode, cited documents, every stock number