Why Is Stainless Steel SmartPlug Inlet Listed for Marine Use and Plastic Housing Models Are Not

Updated 02/07/2026 | Published 02/03/2026

Products Featured in This Question

SmartPlug RV Power Inlet and Connector - 30 Amp - White

(124)

$250.20

SmartPlug RV and Marine Power Inlet and Connector - 30 Amp - Stainless Steel

(162)

$321.30

Question:

Why is part SM67FR stainless steel listed as marine while the plastic versions are not?

asked by: Mike

Expert Reply:

Hi Mike; the SmartPlug RV and Marine Power Inlet and Connector # SM67FR uses a 316 cast stainless steel housing, which offers maximum corrosion resistance. That’s the main reason it’s listed as a marine product. It can be used on an RV as well, but SmartPlug designed it with harsh marine environments in mind where constant exposure to moisture and salt air is a bigger concern.

The plastic-housing version # SM77FR can also be used on both RVs and boats and is UV resistant. Realistically, the “marine” label is more related to materials and marketing. Stainless tends to appeal more to boat owners, while the plastic housing is often the choice for RV applications.

Are you adding a SmartPlug to your trailer or something else?

expert reply by: Robin H