Lycoming STD-425 No. 10 Plain Washer
Lycoming STD-425: No. 10 plain washer, listed in the fuel line attaching parts of IO-360 engines and in the oil pressure relief valve of O-235, O-320 and O-540 series engines.
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- STD425
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- FAA
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- New
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Lycoming STD-425 is a new No. 10 plain washer from the Lycoming standard hardware range. The IO-360-L2A and (L)IO-360-M1A parts catalogues list it in the fuel lines and attaching parts, with No. 10-32 screws STD-692 and STD-860 and locknut STD-670. The O-235, O-320 and O-540-B, -E and -G series catalogues list it in the oil pressure relief valve group as required (O-235 and O-540: up to nine), and the O-540 catalogue also at the magneto harness brackets.
Quantity and position follow the parts catalogue for the engine model. Fit depends on the engine model and serial number.
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