Pass & Seymour STB Series Liqu...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$60.40
Pass & Seymour STB Series Liquid-Tight Strain Relief Connector

Pass & Seymour STB Series Liquid-Tight Strain Relief Connector

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Model: STB50-SF

In Stock (leaves warehouse same day if ordered before 3pm ET)

$60.40
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Pass & Seymour STB Series Liquid-Tight Strain Relief Connector

The Pass & Seymour STB Series Liquid-Tight Strain Relief Grip is a male conduit grip engineered to connect liquid-tight flexible conduit to electrical enclosures while preventing conduit pullout. This family is available in trade sizes ranging from 1/2" through 1-1/4", giving electricians a consistent, code-compliant grip solution across a range of conduit diameters. Every STB Series grip is woven of stainless steel mesh with zinc plated steel or malleable iron bodies and nuts for corrosion resistance, and each is supplied with an insulated throat that protects conductor insulation against damage from flexing, heat expansion, and contraction. Backed by UL and CSA listings, this grip is built for demanding motor and enclosure wiring applications where liquid-tight conduit is subject to motion or strain.

Key Features

  • Trade Size Range: Available from 1/2" through 1-1/4" diameter, male conduit grip for connecting liquid-tight flexible conduit to electrical enclosures.
  • Durable Construction: Stainless steel mesh with zinc plated steel or malleable iron bodies and nuts provides corrosion resistance for long service life across the size range.
  • Insulated Throat: Every size in the STB Series is supplied with an insulated throat that protects conductor insulation and guards against damage caused by flexing, heat expansion, and contraction.
  • Woven Mesh Grip: Stainless steel mesh weave grips securely around the conduit jacket to resist pullout, with mesh length sized to the selected trade size.
  • Motion & Strain Protection: Recommended for the wiring of motors and any electrical enclosure where liquid-tight conduit is subject to motion or strain.
  • Corrosion Resistance: Zinc plated steel or malleable iron bodies and nuts resist corrosion in demanding industrial and commercial environments.

Certifications & Compliance

  • UL Listed
  • CSA Listed

Technical Specifications

  • Trade Size: 1/2" and 1-1/4" options available
  • Standards: UL-CSA
  • Country of Origin: Mexico
  • Packaging: 20 EA

Typical Applications

  • Motor Wiring and Connections
  • Liquid-Tight Flexible Conduit Systems
  • Electrical Enclosures Subject to Motion or Vibration
  • Commercial and Industrial Electrical Installations
  • Strain-Relief at Conduit-to-Enclosure Transitions

Why Pass & Seymour?

Pass & Seymour STB Series grips combine corrosion-resistant stainless steel mesh with zinc plated steel or malleable iron bodies and an insulated throat to deliver dependable strain relief for liquid-tight conduit runs across the full 1/2" to 1-1/4" size range. With UL and CSA listings behind every fitting, electricians can specify these grips for motor circuits and enclosures where reliable, code-compliant pullout protection is required, regardless of the trade size selected.

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Product Specs

list_batch:
PASS-20260820
Product Type:
Strain Relief Connector
Standards:
UL-CSA
Department:
Electrical
Product Group:
Wiring Devices
Product Material:
Stainless Steel
Product Finish:
Zinc-Plated
Product Subgroup:
Cord Grips

Pass & Seymour STB50-SF – Frequently Asked Questions

1) What trade sizes does the Pass & Seymour STB strain relief grip come in?
Two orderable sizes: 1/2 inch (STB50-SF) and 1-1/4 inch (STB125-SF). The STB family spans 1/2 inch through 1-1/4 inch trade sizes, so match the grip to the trade size of the liquid-tight flexible conduit you're terminating, not to the conductor count inside it.
2) Will this grip thread into a standard enclosure hub or knockout?
The STB is a male conduit grip, so it threads into a female hub and is secured to the enclosure with the supplied nut on a knockout. The body and nut are zinc plated steel or malleable iron. Match the trade size of the grip to the knockout or hub thread, 1/2 inch or 1-1/4 inch.
3) Are these grips UL listed for an inspected commercial job?
Both the 1/2 inch and 1-1/4 inch STB grips are UL Listed and CSA Listed, carried in the spec data as UL-CSA. That covers the usual inspector question on a commercial or industrial motor termination.
4) Is a liquid-tight strain relief grip the right choice, or should I just use a standard liquid-tight connector?
A plain liquid-tight connector seals the conduit to the box but does nothing about pullout. The STB adds a woven stainless steel mesh grip around the conduit jacket, which is what you want where the conduit moves, vibrates, or is pulled, motor terminations being the usual case. For a fixed conduit run with no motion or strain, a standard liquid-tight connector is enough.
5) Does the STB grip protect the conductor insulation where it enters the enclosure?
Yes, every size ships with an insulated throat. That is what keeps conductor insulation from being chewed by the metal fitting as the conduit flexes and as the assembly expands and contracts with heat.
6) Will a Pass & Seymour STB grip hold up in a wet or corrosive industrial area?
The mesh is stainless steel and the body and nut are zinc plated for corrosion resistance, which covers typical wash-down, damp, and industrial plant conditions. Note the mesh grips the conduit jacket, it is not a liquid seal by itself, so the fitting still has to be installed into a liquid-tight system correctly.
7) How are the STB strain relief grips packaged for a stockroom order?
Packaging is 20 each. If you're standardizing an MRO crib on one motor-connection fitting, that's the unit to plan around. Country of origin is Mexico.
8) Does the mesh length change with the trade size on the STB grips?
Yes. The stainless mesh weave is sized to the trade size selected, so the 1-1/4 inch STB125-SF has a longer mesh section than the 1/2 inch STB50-SF. Allow for that extra length of conduit jacket past the enclosure when you lay out a motor connection in a tight space.
How fast can I get the Pass & Seymour STB50-SF delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Pass & Seymour STB50-SF come with a warranty?
Absolutely. The Pass & Seymour STB50-SF is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Pass & Seymour STB50-SF?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Pass & Seymour STB50-SF from ZenSupply?
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