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Sierra Marine Weatherproof Ignition Switch Face Nuts

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Sierra Marine weatherproof ignition switch face nuts are designed to fit the Sierra MP3910 and MP39120 polyester ignition switches. These retaining nuts feature a rotating rubber seal to keep out moisture and dust from the lock cylinder. They have extra-long threads for positive engagement on mounting bushing for early pre-1995 style with 13/16 in.-20 thread only. All Sierra Marine parts are engineered to meet or exceed OEM standards—and will stand up in harsh marine environments.

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Sierra Marine Weatherproof Ignition Switch Face Nuts MP39270

Retainer Nut, Ignition Switch Component, Chrome Nut, Weather Proof, 13/16-20 Thread Size, Sierra Marine Polyester Ignition Switches, Each

Part Number: RRA-MP39270

Not Yet Reviewed

Estimated Ship Date: May 27, 2026 if ordered today

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Estimated Ship Date: May 27, 2026 if ordered today

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