Machined Stepped Pump Stub Shaft Adapter - Keyed, Threaded Impeller End - Unidentified Manufacturer

Machined stepped pump stub shaft / shaft adapter with a keyed ground journal and a male threaded impeller nose, and a counterbored hub end with a radial set-screw hole for clamping onto a driving shaft. Bright ground finish, bare shaft only — no bearings, seals, key, set screws, or impeller included.

Application: not verified. No manufacturer mark or OEM part number appears anywhere on the part; the only markings are hand-written shop inventory notations on an old tape label. Sold by photographs, identifiers, and dimensions only.

Condition: unknown / untested. The shaft photographs clean and bright with no visible scoring, galling, or corrosion pitting, but no runout, diameter, hardness, or thread verification has been performed and no testing of any kind is implied.

Approximate dimensions (photo estimates, verify with calipers): overall length 6.5–7 in, hub OD 1.6–1.8 in, main journal OD 0.85–1.0 in, threaded nose 0.55–0.65 in. Critical fitment dimensions — hub bore ID, keyway width/length, shoulder spacing, and impeller thread size, pitch, and hand — have not been measured.

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.