What it is
AN960 flat washer, Flat washer, fits NO. 5 bolt or screw; ID (A) .140" ±.010; OD (D) .438", thickness .042" (only thickness in this Table I row)
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