Part #: PBC4201A

4-Inch Nylon Bottom Outlet Cap with Black Nitrile Gasket and 2 Stainless Steel Cables

The Salco Products (PBC4201A) 4-Inch Nylon Bottom Outlet Cap with Black Nitrile Gasket and 2 Stainless Steel Cables is made out of corrosion-resistant nylon material with a 2-inch nylon plug. It fits a standard 5-1/4-inch railroad thread for application to any car manufacturer’s nozzle. Comes with a 1/4-inch, zinc plated carbon steel, repair link, and two (2) stainless steel cables. This model includes an easily replaceable black Nitrile gasket that is 1/4-inch thick with a 4-5/16-inch inner diameter and a 5-3/8-inch outer diameter. Weighs approximately three (3) pounds. AAR Approval # E202138

Key features

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Ergonomic lightweight belly cap that reduces operator injuries from the handling of heavy and awkward steel designs.

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Constructed of corrosion-resistant nylon material.

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Less force/torque required to apply and remove cap.

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Lightweight - approximately three (3) pounds.

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Cap assembly available with: Cable, Stainless Steel Chain, Carbon Steel Chain.

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A broad range of gasket material options allows for use in various commodities.

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Standard 5-1/4-inch RR thread allows for application to any manufacturer's nozzle.

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Steel reinforced hex head increases grip area to reduce wrench slippage.

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AAR Approval # E202138

Specifications

Cap Material
Nylon
Gasket Material
Black Nitrile
Securement Material
Stainless Steel
Securement Type
Cable

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AAR Approval: E-202138

Resources

Product Card • December 17, 2025

Plastic Bottom Outlet Cap