Ensure your tractor's cooling system operates efficiently with this durable, 4 PSI radiator cap. Built for 1" filler necks, it offers reliable performance and precise fitment for a wide range of tractors. Compatibility This radiator cap is compatible with tractors from Ford, Massey, Allis Chalmers, Case, Minneapolis Moline, and White/Oliver. Specific Ford models include: - Ford Tractors: 9N, 2N, 8N (1939–1952), Jubilee, NAA, 501, 541, 600, 601, 610, 611, 620, 621, 630, 631, 530, 640, 641, 650, 651, 660, 661, 665, 550, 671, 681, 655, 700, 701, 755, 702, 703, 713, 723, 740, 741, 760, 770, 771, 775, 800, 801, 811, 820, 821, 840, 841, 850, 851, 860, 861, 871, 881, 900, 901, 910, 940, 941, 950, 951, 960, 961, 971, 981, 2000 (3-Cyl. and 4-Cyl.), 4000 (3-Cyl. and 4-Cyl.), 5000, 6000, 6600, 7000, 8000, 9000; Industrial: 515, 530, 531, 532, 535, 540. For Massey, Allis Chalmers, Case, Minneapolis Moline, and White/Oliver tractors, verify compatibility using the replacement part numbers provided. Key Features - 4 PSI cap: Designed for pressurized cooling systems with 1" filler necks. - Precise dimensions: 2.330" OD, 1.500" center ID, 1.35" tall, 2.000" tang-to-tang length, and 0.440" tab width. - Includes gasket: Ensures a secure seal for reliable operation. Replacement Numbers Replaces Ford part numbers 2N8100A, ECON8100AA, E5NN8100RA, and 1T8100A2. Also compatible with: - Massey: 180224M91, 180224M92, 184528M91, 850876M91. - Allis Chalmers: 228545. - Case: G45179, K906196, K945363. - Minneapolis Moline: 10P689, 10A10056. - White/Oliver: 155239A, 155611A, 30-3225917. OEM Note OEM part numbers are provided for reference only and should be verified for compatibility before purchase. JJAgParts Quality Promise As a family-owned business, JJAgParts rigorously monitors every product for quality and fitment. If you're not completely satisfied, contact us—we're here to help.