Description / Abstract:
This SAE Metric Aerospace Recommended Practice (MAP) is intended
as a guide toward standard practice for selection of nominal hex
widths for fittings.
Field of Application:
Primarily for fittings which are machined from bar stock and
incorporate a hex wrenching surface. The document applies to union
fittings (both ends the same size). For reducer fittings, use the
hex width for the largest fitting end.