Part #: K4SU6A

4-Inch Thread On Stainless Steel Quick Connect Assembly, Black Viton A Gasket

Salco Products (K4SU6A) 4-Inch Thread On Stainless Steel Quick Connect Assembly, Black Viton A Gasket fits a 5-1/4-inch rail road thread. The quick connect adapter is made out of 316 stainless steel, and features a 4-inch cam groove. Includes a 3/8-inch, 18-8 stainless steel, chain with 15 links, a 3/8-inch by 3-1/2-inch, 18-8 stainless steel, S-hook, a 3/8-inch by 1-3/4-inch, 18-8 stainless steel, hex bolt , a 3/8-inch, 18-8 stainless steel, lock nut, and two (2) 3/8-inch, 18-8 stainless steel, flat washers. Comes with a black Viton A gasket. The 4-inch, quick connect, cammed cap is made out of 316 stainless steel with 304 stainless steel straight cam arms. Features a 1-inch male NPT, 416 stainless steel, plug assembly with 3/8-inch, 18-8 stainless steel, chain link with 15 links, and two (2) 3/8-inch by 3-1/2-inch, 18-8 stainless steel, S-hooks. Cap comes with a black Viton A gasket. AAR Approval # E-139514, 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
316 Stainless Steel
Cap Material
316 Stainless Steel
Gasket Material
Black Viton A
Location
Bottom
Size
4"

Resources

Product Card • December 17, 2025

Bottom Unloading Adapters