318971 OMC PROP. NUT

OEM OMC Johnson/Evinrude propeller nut 318971 is a hex-threaded brass and stainless-steel fastener (0.5 inch diameter, coarse pitch) that secures the propeller to the drive shaft on Johnson and Evinrude 8HP, 9.9HP, 10HP, and 15HP outboard motors. This nut is critical for safe propeller attachment and must be properly torqued to prevent propeller slippage or loss. Original OMC part ensures correct fitment and reliable hold. Replacement is necessary if threads are stripped, cross-threaded, or damaged.