4-Bolt Square Flange Adapter Fitting with Round Spigot - Used

Used 4-bolt square flange adapter with a round spigot / stub-tube outlet and a flat machined gasket face on the reverse side. Cast construction, unmarked — no manufacturer tag, casting number, or part number is legible on this piece.

Application: Not verified. This is a generic-style 4-bolt flange transition of the type used in marine diesel raw-water and coolant plumbing, wet-exhaust transitions, and accessory mounting adapters. Application and interchangeability have NOT been confirmed. It is offered by photographs, identifiers, and dimensions only.

Condition: Used take-off, untested (Grade C). Surface scale, patches of light rust, and mineral deposits around the spigot and bore. No cracks or damage visible in the photos, but the part has not been cleaned, crack-checked, pressure-tested, or dimensionally verified. Sealing surface should be inspected and dressed before installation.

Measurements available on request — please ask for bolt spacing, bore diameter, spigot O.D., and flange thickness so you can compare against your OEM part before you buy.

Quote is subject to final fitment confirmation by engine/transmission serial number, part number, photos, and supplier availability.

Buyer must confirm fitment by part number, photos, dimensions, engine model, serial number, and application before purchase.

Used marine part sold as-is unless otherwise stated. No returns on electrical, used, special-order, or installed parts.