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SAE ARP4919
- Fluid Connections, Fittings, Hex Width
- standard by SAE International, 01/01/2013
- Publisher: SAE
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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.
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