Gold-colored castle nut with internal threading and six notches around the outer edge for locking.
Gold-colored castle nut with internal threading and notched outer edges for securing with a cotter pin.
Yellow castle nut with internal threads, part of a mechanical assembly, shown with a shaft and retaining clip.
Gold-colored castle nut with internal threading and six notches around the outer edge for locking.
Gold-colored castle nut with internal threading and notched outer edges for securing with a cotter pin.
Yellow castle nut with internal threads, part of a mechanical assembly, shown with a shaft and retaining clip.

Castle Nut

0245B0.75-10

Brass castle nut for 1"–1-1/8" inboard prop shafts using 3/4"-10 thread. Locks with cotter pin for secure driveline retention.

$38.22
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In Stock

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This marine-grade brass castle nut is built for inboard prop shafts with a 1" to 1-1/8" diameter using 3/4"-10 thread pitch, a standard on many Malibu and Axis boats. Its castellated design allows a cotter pin to lock the nut in place, preventing vibration-related loosening and securing your propeller to the shaft. Machined to precise standards and resistant to corrosion, this nut is essential for propeller retention in both salt and freshwater conditions.

Key Features:

  • Fits 1"–1-1/8" prop shafts (3/4"-10 thread)

  • Castle-style slots for cotter pin security (cotter pin not included)

  • Brass construction for long-term corrosion resistance

  • Used on Malibu, Axis, and other inboard boats

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