AN177-55

What it is: AN177 close tolerance hex head bolt (AN173 THRU AN186), Hex head, close tolerance, .4375-20 UNF-3A, shank (A dia) .4367-.4362", grip 5.062" (±.016), length 5.719" (+.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 →

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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

Head: Hex head, close tolerance
Diameter: .4375-20 UNF-3A, shank (A dia) .4367-.4362"
Grip / length: grip 5.062" (±.016), length 5.719" (+.031 -.016 as printed) (AN173 THRU AN186 Rev. 7 sheet 3, Table II)
Material: Non-corrosion resistant steel (no material letter)

Install tooling, by who made the partNot documented for this part number.

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Drop-in equivalents

Identical or approved-alternate part numbers, each with the document that states it.

No sourced equivalent on file for AN177-55. SpecLok only lists an equivalent when a manufacturer or government document states it.