Minerallac Heavy Duty 2-Hole C...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$81.68
$24.54
Minerallac Heavy Duty 2-Hole Conduit Strap for 5" Rigid/IMC Conduit with Zinc Plated Steel Construction

Minerallac Heavy Duty 2-Hole Conduit Strap for 5" Rigid/IMC Conduit with Zinc Plated Steel Construction

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Model: HD297

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

$81.68
$24.54
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Minerallac Heavy Duty 2-Hole Conduit Strap for 5" Rigid/IMC Conduit with Zinc Plated Steel Construction

Professional Heavy-Duty Conduit Support for Demanding Applications

The Minerallac Heavy Duty 2-Hole Conduit Strap delivers reliable support for 5" Rigid/IMC conduit installations where standard single-hole straps cannot provide adequate load capacity. Constructed from heavy-duty gauge steel with zinc plated finish, this stamped strap provides superior durability and corrosion resistance for both indoor and outdoor electrical conduit applications.

Professional Features & Benefits

  • Heavy-Duty Steel Construction: Stamped from heavy-duty gauge steel material provides superior strength and load-bearing capacity for demanding conduit support applications.
  • Two-Hole Mounting Design: Dual mounting holes distribute load forces more effectively than single-hole straps, ensuring secure attachment to various mounting surfaces.
  • 5" Rigid/IMC Compatibility: Precisely sized to fit 5" trade size rigid and IMC conduit for reliable support without over-tightening or conduit deformation.
  • Zinc Plated Finish: Protective zinc plating provides excellent corrosion resistance and extends service life in both indoor and outdoor installations.
  • Versatile Mounting Options: Compatible with component, wood, steel, and concrete mounting surfaces for flexible installation requirements.
  • Professional Dimensions: 5.75" x 10.70" x 1.25" overall size with 0.25" thickness provides robust support structure for heavy conduit runs.

Technical Specifications

  • Cable Size: Fits 5" Rigid/IMC.
  • Construction: Stamped
  • Country Of Origin: United States
  • Mounting Holes: 2
  • Mounting Holes O C : 8-May
  • Mounting Method: Component, Wood, Steel, Concrete
  • Number Of Holes: 2
  • Product Color: Silver
  • Product Finish: Zinc Plated
  • Product Height: 5.750 in
  • Product Length: 1.250 in
  • Product Material: Steel
  • Product Size: 5.75" x 10.70" x 1.25
  • Product Type: 2-Hole Strap
  • Product Width: 10.680 in
  • Thickness: 0.25
  • Trade Size: 5

Installation & Operation

  1. Mount the strap in a suitable location with appropriate clearance and access for conduit installation and service.
  2. Secure the strap to the mounting surface using appropriate fasteners for the substrate type (component, wood, steel, or concrete).
  3. Position the 5" rigid or IMC conduit within the strap opening ensuring proper fit without over-compression.
  4. Verify that the dual mounting holes provide adequate load distribution for the specific conduit run and loading conditions.
  5. Complete installation following applicable electrical codes and manufacturer guidelines for conduit support spacing.
  6. Inspect the installation to ensure secure mounting and proper conduit support before energizing the system.

Professional Applications

  • Commercial and Industrial Electrical Installations
  • Heavy Conduit Runs Requiring Enhanced Support
  • Outdoor Electrical Distribution Systems
  • Manufacturing and Processing Facilities
  • Utility and Infrastructure Projects
  • Multi-Story Building Electrical Systems
  • High-Load Electrical Conduit Applications

Why Choose Minerallac Quality?

Minerallac delivers professional-grade electrical hardware manufactured in the United States with heavy-duty steel construction and protective zinc plated finish. The stamped construction and precise dimensional tolerances ensure reliable performance in demanding conduit support applications where standard straps cannot provide adequate load capacity.

Manufacturer Resources

Product Specs

Cable Size:
Fits 5" Rigid/IMC.
Construction:
Stamped
Country Of Origin:
United States
Mounting Holes:
2
Mounting Holes O C:
8-May
Mounting Method:
Component, Wood, Steel, Concrete
Number Of Holes:
2
Product Color:
Silver
Product Finish:
Zinc Plated
Product Height:
5.750 in
Product Length:
1.250 in
Product Material:
Steel
Product Size:
5
Product Type:
Conduit Strap
Product Width:
10.680 in
Thickness:
0.25
Department:
Electrical
Product Subgroup:
Hangers, Straps & Supports
Product Group:
Hangers, Supports & Fasteners

Minerallac HD297 – Frequently Asked Questions

1) What are the mounting hole centers on the Minerallac HD297 5 inch conduit strap?
The two mounting holes are on 5-8 inch centers, so you need to lay out anchors at that spacing rather than assuming a single point of attachment like a one-hole strap. Overall the strap measures 5.75 x 10.70 x 1.25 inches with 0.25 inch thick stock, so give yourself the full 10.70 inch run of surface to land both feet flat. On block or concrete that means two anchors per strap.
2) Should I use a two-hole strap or a one-hole strap for 5 inch rigid conduit?
At 5 inch trade size, go two-hole. A one-hole strap carries the whole conduit load on a single fastener and lets the pipe rotate against the mounting surface; the HD297's two holes on 5-8 inch centers split the load across two anchors and lock the strap against twisting. That matters on vertical risers and on long horizontal runs where the conduit itself is heavy before you pull a single conductor. One-hole straps are fine on small trade sizes and light branch work.
3) Can a 5 inch conduit strap with a zinc plated finish be used outdoors or in a wet location?
Zinc plated steel handles outdoor and damp exposure, and Minerallac states the HD297 for both indoor and outdoor conduit runs. Where it earns its keep is covered exterior work, loading docks, parking structures, plant yards. For coastal salt air or a corrosive process environment, zinc plating is the wrong specification and you want stainless or a hot dip galvanized strap instead.
4) Is the Minerallac HD297 heavy duty conduit strap made in the USA?
Yes, the HD297 is manufactured in the United States. On federally funded work and on projects with a domestic content requirement, that is the answer procurement needs in writing, and it is why this strap clears specifications that imported hardware does not. It is a stamped steel part, silver zinc plated.
5) How much clearance does a 5 inch two-hole conduit strap hold the pipe off the wall?
The strap projects 1.25 inches in its short dimension, so the conduit sits off the mounting surface rather than tight against it, which leaves room to get a wrench on couplings and keeps water from sitting in the contact line on exterior walls. Stock is 0.25 inch thick. If your detail calls for a specific standoff or for the conduit held well clear of the wall, a strut and clamp assembly is the better route than a strap.
6) Can I mount a Minerallac HD297 conduit strap directly to steel or to strut?
Steel is one of the four substrates Minerallac lists for the HD297, along with component, wood, and concrete. Two holes on 5-8 inch centers means you are bolting or screwing through both feet, so on strut confirm the hole spacing lands on your channel before you commit a run of them; the strap is 10.70 inches across its long dimension. On structural steel, self-drilling screws or through-bolts both work.
7) How many HD297 straps do I need for a 5 inch rigid conduit run?
Support spacing for 5 inch rigid and IMC comes from the NEC support tables, not from the strap, and rigid at that trade size allows a wider interval than small sizes do, with a fitting or box supported within the distance the code requires of it. Count your straps off the drawing run length at the interval your inspector holds you to, then add one at each termination. Each strap takes two anchors, so double that number for fasteners.
8) What is the Minerallac part number for the 5 inch two-hole heavy duty conduit strap?
Model HD297. That is the number to quote for the 5 inch trade size, zinc plated, two-hole heavy duty strap; Minerallac's numbering runs a separate part per trade size, so the HD297 is the 5 inch and nothing else. Give the full model when ordering rather than describing it, since the smaller sizes look identical in a photo.
How fast can I get the Minerallac HD297 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 Minerallac HD297 come with a warranty?
Absolutely. The Minerallac HD297 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 Minerallac HD297?
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
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