Part #: K4IU2A

4-Inch Thread On Ductile Iron Quick Connect Assembly, White FDA Nitrile Gasket

Salco Products (K4IU2A) 4-Inch Thread On Ductile Iron Quick Connect Assembly, White FDA Nitrile Gasket fits a 5-1/4-inch rail road thread. The quick connect adapter is 6-1/2-inches high, made out of ductile iron, and features a 4-inch cam groove. Includes a 3/8-inch, carbon steel, chain with 15 links, a 3/8-inch by 3-1/2-inch, zinc plated carbon steel, S-hook, a 3/8-inch by 1-3/4-inch, zinc plated carbon steel, hex bolt, a 3/8-inch, zinc plated carbon steel, nut, and a 3/8-inch, zinc plated carbon steel, flat washer. Comes with a white FDA nitrile gasket. The 4-inch, quick connect, cammed cap is made out of ductile iron with 304 stainless steel straight cam arms. Features a 1-inch male NPT, carbon steel, plug assembly with 1/4-inch, carbon steel, swivel link and 15 chain links with an approximate length of 19-inches. The cap includes two (2), zinc plated carbon steel, 3/8-inch by 3-1/2-inch S-hooks, and 3/8-inch, 18-8 carbon steel, chain of 15 links with an approximate length of 21-inches. Cap comes with a white FDA nitrile gasket. AAR Approval # E-232133. Not Approved for DOT Stenciled Cars.

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Key features

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Provides direct connection to kam and grooved hoses or adapters, no additional components required.

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3", 4" and 6" sizes.

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Reducing Flanges available.

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Designed to provide a secure fitting that will minimize leaks and spills.

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DOT (threaded) and AAR (kammed) approved designs.

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Assemblies include adapter, cap, plug, chain and gaskets.

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Available in Stainless Steel or Ductile Iron.

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Contact your Salco Representative for the specific adapter types and sizes that will fit your needs.

Specifications

Adapter Material
Ductile Iron
Cap Material
Ductile Iron
Gasket Material
White FDA Nitrile
Location
Bottom
Size
4"

AAR Approval

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AAR Approval: E-232133

Resources

Product Card • December 17, 2025

Bottom Unloading Adapters