SAE ARP4919
Fluid Connections, Fittings, Hex Width.
This SAE Aerospace Recommended Practice (ARP) is intended as a guide toward standard practice for selection of nominal hex widths for fittings.
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.
History:Standard | Published | Revision | Status |
---|---|---|---|
ARP4919 | 1998-05-01 | Latest |