National 240414 Steering Gear Sector Shaft Seal

Steering Gear Sector Shaft Seal for Classic Ford and Mercury

National 240414 is a steering gear sector shaft seal built for vehicles that use a 1.000-inch shaft and a 1.437-inch housing bore. It uses nitrile sealing material to help maintain a tight seal in manual steering and normal power steering applications on select Ford Mustang, Mercury Capri, Mercury Colony Park, Mercury Cougar, Mercury Marquis, Mercury Marauder, and Mercury Villager models.

Key Features

• Part number 240414 steering gear sector shaft seal
• Nitrile sealing material for oil sealing applications
• 1.000 in. shaft size and 1.437 in. housing bore
• 0.187 in. width for the specified steering gear design
• National 240000 series oil seal construction
• Direct-fit style for select classic Ford and Mercury steering gear service

Product Details

National 240414 is an oil seal used in steering gear sector shaft service where the shaft diameter, housing bore, and seal width must match the original design. The seal measures 1.000 inch inside diameter, 1.447 inch outside diameter, and 0.187 inch thickness, with metric equivalents of 25.400 mm, 36.750 mm, and 4.750 mm. Built with nitrile material, it is suited to sealing fluid at the steering gear sector shaft on vehicles that call for this exact size combination. This part cross-references Dorman - Autograde 65242 for the same application.

Compatible With 1964-1973 Ford Mustang, 1966-1967 Mercury Capri, 1964-1973 Mercury Colony Park, 1967-1973 Mercury Cougar, 1967-1973 Mercury Marquis, 1964-1970 Mercury Marauder, and 1962-1967 Mercury Villager, depending on steering configuration and shaft size. National 240414 is also listed for 1969-1973 Ford Mustang and 1970-1972 Ford Mustang with manual steering and a 1.000-inch shaft.

What This Seal Helps Address

• Steering gear oil seepage at the sector shaft
• Fluid loss from worn or hardened seal material
• Contamination entering the steering gear housing
• Loose sealing at the shaft-to-housing interface
• Service replacement for aging manual steering or power steering gear assemblies

Installation Notes

Verify the shaft diameter, housing bore, and seal width before installation. This seal is listed for vehicles with a 1.000-inch shaft, and some applications specify manual steering while others specify normal power steering. Confirm the steering gear configuration on the vehicle before ordering. For fitment examples, this part fits 1964-1968 Ford Mustang, manual steering; fits 1970-1972 Ford Mustang, manual steering; and fits 1967-1973 Mercury Cougar, normal power steering.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing components for current and legacy vehicle service. Part number 240414 is part of the National 240000 series and is engineered for steering gear sealing applications where accurate dimensions and material selection matter.