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Stainless Steel Boxes

Stainless steel electrical enclosures provide protection in indoor and outdoor applications as well as an inherent level of RFI/EMI attenuation. Polycase’s stainless steel electrical boxes are UL Listed to UL 508A, meeting NEMA 1, 2, 4, 4X and 12 ratings and IP65 and IP66 requirements for harsh environments. Manufactured from 304 stainless steel, they’re a top enclosure choice for corrosion-resistant, waterproof and weatherproof protection. NEMA stainless steel enclosures are ideal for use in industries such as food and beverage, pharmaceutical, oil and gas and many others.

Polycase stainless steel boxes include an internal mounting panel, external surface mounting brackets, and all hardware for wall mounting. Optional accessories include pole mounting kits, cable management, and venting solutions. We also offer a line of carbon steel enclosures in similar sizes.

Choosing Stainless Steel Enclosures for Your Application

Whether you need a junction box or a control panel, finding the right enclosure starts with considering the needs of your application, such as:

  • Size: Your enclosure needs sufficient room to hold all of its electrical components while accounting for factors such as the space required by design for assembly (DFA) principles. Polycase’s selection of stainless steel enclosures includes a wide variety of sizes. 
  • Protection Rating: Many applications require enclosures with a certain level IP and/or NEMA rating, so check the specifications of your project. Polycase’s stainless steel enclosures are rated for protection up to NEMA Type 4X and IP66, with a waterproof and dustproof gasket that can handle anything from a rainstorm to a pressurized hose washdown.
  • Stainless Steel Type: Various types of stainless steel exist, with different elements used in their production that give them different qualities. 304 stainless steel — the kind you’ll find in our enclosures — is known as a high-performance type of stainless steel suitable for most applications.
  • Convenience and Accessibility: An enclosure’s design features can make a big difference in productivity for the people who install and use them. Our stainless steel boxes include mounting hardware that make them easy to use as wall mount enclosures, plus features such as hinged covers that allow convenient access to interior components.
  • Security: On the other hand, access control is also crucial. Polycase’s stainless steel enclosures include a keyed quarter-turn latch system for strong security. 
  • Appearance: Stainless steel enclosures have a sleek appearance that makes them an excellent choice for applications where a polished image is a must. 
  • Accessories: Consider any enclosure accessories your application might require. Our lineup of SA Series accessories includes all-in-one pole mount kits with all the necessary clamps and hardware.

Shop Polycase’s lineup of NEMA 4X stainless steel enclosures here. Each model is designed to offer the best qualities of stainless steel, with a design that provides industrial-grade protection in a huge range of applications.

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  1. SA-38
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    SA-38 NEMA Stainless Steel Enclosure
    As low as $132.15 per unit
    Internal: 7.5" x 5.5" x 5.7"
    192 x 141 x 147 mm
    External: 7.8" x 5.9" x 5.9"
    200 x 150 x 150 mm
    Material: Stainless Steel
  2. SA-39
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    SA-39 NEMA Stainless Steel Enclosure
    As low as $137.91 per unit
    Internal: 7.5" x 7.5" x 3.8"
    192 x 192 x 97 mm
    External: 7.8" x 7.8" x 3.9"
    200 x 200 x 101 mm
    Material: Stainless Steel
  3. SA-41
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    SA-41 NEMA Stainless Steel Enclosure
    As low as $164.43 per unit
    Internal: 9.5" x 7.5" x 3.8"
    242 x 192 x 97 mm
    External: 9.8" x 7.8" x 3.9"
    250 x 200 x 101 mm
    Material: Stainless Steel
  4. SA-30
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    SA-30 NEMA Stainless Steel Enclosure
    As low as $190.95 per unit
    Internal: 9.5" x 7.5" x 5.7"
    242 x 192 x 147 mm
    External: 9.8" x 7.8" x 5.9"
    250 x 200 x 150 mm
    Material: Stainless Steel
  5. SA-40
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    SA-40 NEMA Stainless Steel Enclosure
    As low as $212.90 per unit
    Internal: 9.5" x 9.5" x 5.7"
    242 x 242 x 147 mm
    External: 9.8" x 9.8" x 5.9"
    250 x 250 x 150 mm
    Material: Stainless Steel
  6. SA-31
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    SA-31 NEMA Stainless Steel Enclosure
    As low as $248.48 per unit
    Internal: 11" x 9.5" x 5.7"
    293 x 243 x 147 mm
    External: 11" x 9.8" x 5.9"
    300 x 250 x 150 mm
    Material: Stainless Steel
  7. SA-32
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    SA-32 Stainless Steel Electrical Box
    As low as $281.45 per unit
    Internal: 11" x 9.5" x 7.7"
    292 x 242 x 197 mm
    External: 11" x 9.8" x 7.8"
    300 x 250 x 200 mm
    Material: Stainless Steel
  8. SA-33
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    SA-33 Stainless Steel Enclosure Box
    As low as $279.01 per unit
    Internal: 11" x 11" x 5.7"
    292 x 292 x 147 mm
    External: 11" x 11" x 5.9"
    300 x 300 x 150 mm
    Material: Stainless Steel
  9. SA-34-01 Natural stainless steel hinged electrical enclosure - 11.81 x 11.81 x 7.87 inches
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    SA-34 NEMA Stainless Steel Enclosure
    As low as $312.51 per unit
    Internal: 11" x 11" x 7.7"
    292 x 292 x 197 mm
    External: 11" x 11" x 7.8"
    300 x 300 x 200 mm
    Material: Stainless Steel
  10. Stainless Steel
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    SA-35 NEMA Stainless Steel Enclosure
    As low as $338.04 per unit
    Internal: 15" x 11" x 5.7"
    392 x 292 x 147 mm
    External: 15" x 11" x 5.9"
    400 x 300 x 150 mm
    Material: Stainless Steel
  11. SA-36
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    SA-36 NEMA Stainless Steel Enclosure
    As low as $372.75 per unit
    Internal: 15" x 11" x 7.7"
    392 x 292 x 197 mm
    External: 15" x 11" x 7.8"
    400 x 300 x 200 mm
    Material: Stainless Steel
  12. SA-43
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    SA-43 NEMA Stainless Steel Enclosure
    As low as $390.52 per unit
    Internal: 15" x 13" x 7.7"
    392 x 346 x 197 mm
    External: 15" x 13" x 7.8"
    400 x 355 x 200 mm
    Material: Stainless Steel
  13. SA-37-01 Natural stainless steel hinged electrical enclosure - 15.75 x 15.75 x 7.87 inches
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    SA-37 NEMA Stainless Steel Enclosure
    As low as $437.84 per unit
    Internal: 15" x 15" x 7.7"
    392 x 392 x 197 mm
    External: 15" x 15" x 7.8"
    400 x 400 x 200 mm
    Material: Stainless Steel
  14. Large stainless steel enclosures
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    SA-46 Large Stainless Steel Enclosure
    As low as $603.61 per unit
    Internal: 19" x 15" x 8.1"
    500 x 398 x 208 mm
    External: 20" x 16" x 8.0"
    508 x 406 x 203 mm
    Material: Stainless Steel
  15. SA-49
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    SA-49 Stainless Steel Electrical Boxes
    As low as $816.05 per unit
    Internal: 19" x 19" x 12"
    500 x 500 x 310 mm
    External: 20" x 20" x 12"
    508 x 508 x 305 mm
    Material: Stainless Steel
  16. SA-51
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    SA-51 NEMA Stainless Steel Enclosure
    As low as $690.69 per unit
    Internal: 23" x 15" x 8.1"
    601 x 398 x 208 mm
    External: 24" x 16" x 8.0"
    610 x 406 x 203 mm
    Material: Stainless Steel
  17. SA-52
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    SA-52 NEMA Stainless Steel Enclosure
    As low as $801.68 per unit
    Internal: 23" x 19" x 8.1"
    601 x 500 x 208 mm
    External: 24" x 20" x 8.0"
    610 x 508 x 203 mm
    Material: Stainless Steel
  18. SA-54
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    SA-54 NEMA Stainless Steel Enclosure
    As low as $975.95 per unit
    Internal: 23" x 23" x 10"
    601 x 601 x 259 mm
    External: 24" x 24" x 10"
    610 x 610 x 254 mm
    Material: Stainless Steel

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