Minerallac INS66 Insulated Pla...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$50.65
$0.45
Minerallac INS66 Insulated Plastic Sheathed Cable Staple, Gray, 100-Pack

Minerallac INS66 Insulated Plastic Sheathed Cable Staple, Gray, 100-Pack

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Model: INS66

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

$50.65
$0.45
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Minerallac INS66 Insulated Plastic Sheathed Cable Staple, Gray, 100-Pack

The Minerallac INS66 is an insulated plastic sheathed cable staple engineered for securing 3-wire #8 and #6 NM cable, as well as other cable up to 21/32" wide. Built with a zinc plated steel and molded plastic construction and finished in a silver grey (gray) color, this staple combines a rigid metal core with a protective plastic insulator to guard cable jacketing from abrasion and crush damage during installation. Each package contains 100 staples, giving electricians and contractors a ready supply for residential and light commercial wiring projects. The plastic insulator is UV stabilized, making the INS66 suitable for use in severe weather conditions where sunlight exposure and outdoor temperature swings would otherwise degrade an uninsulated fastener. Whether you're roughing in new construction wiring or securing NM cable during a renovation, the INS66 offers a proven, code-conscious fastening method that protects cable jackets while holding cable securely to framing members.

Key Features

  • Cable Size: Designed for 3-wire #8 and #6 NM cable and other cable up to 21/32" wide, accommodating a range of common residential and commercial cable gauges.
  • Durable Construction: Zinc plated steel body with molded plastic insulator provides mechanical strength while the plastic component protects the cable jacket from nicks and cuts.
  • Insulated Design: The plastic insulator adds a layer of protection between the metal staple and the NM cable, reducing the risk of jacket damage during fastening.
  • UV Stabilized: Formulated to withstand severe weather conditions, resisting degradation from prolonged sun and outdoor exposure.
  • Color: Finished in silver grey (gray) for a clean, low-visibility appearance against typical wiring and framing surfaces.
  • Bulk Pack: Supplied in a 100-pack, providing ample quantity for larger wiring runs without frequent reordering.

Technical Specifications

  • Cable Size: For 3-wire #8 and #6 NM cable and other cable up to 21/32" wide.
  • Construction: Plastic Injection Molding
  • Country Of Origin: United States
  • Insulation: Plastic Insulator
  • Product Color: Silver Grey
  • Product Material: Zinc Plated Steel Molded Plastic
  • Product Type: Non-Metallic Sheathed Cable Staple

Typical Applications

  • Residential NM (Romex) Cable Installations
  • Securing 3-Wire #8 and #6 NM Cable to Framing Members
  • Light Commercial Electrical Wiring
  • Outdoor or Weather-Exposed Cable Runs
  • New Construction and Renovation Wiring Projects

Why Minerallac?

Minerallac builds the INS66 cable staple with a zinc plated steel and molded plastic construction that balances holding strength with cable protection. The UV stabilized plastic insulator ensures the staple performs reliably even in severe outdoor weather conditions, giving electricians confidence in both indoor and exposed installations. Manufactured in the United States, the INS66 delivers a dependable, code-conscious fastening solution for NM cable in the 100-pack quantity contractors need for larger jobs. For crews standardizing on a single trusted fastener across residential and light commercial projects, the INS66's combination of insulation, UV stability, and bulk packaging makes it an efficient, reliable choice for keeping NM cable properly secured and protected throughout the life of an installation.

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Manufacturer Resources

Product Specs

Cable Size:
For 3-wire #8 and #6 NM cable and other cable up to 21/32" wide.
Construction:
Plastic Injection Molding
Country Of Origin:
United States
Insulation:
Plastic Insulator
Product Color:
Silver Grey
Product Material:
Zinc Plated Steel Molded Plastic
Product Type:
Non-Metallic Sheathed Cable Staple
Department:
Electrical

Minerallac INS66 – Frequently Asked Questions

1) Will a Minerallac INS66 staple fit 6/3 NM cable?
Yes. The INS66 is sized for 3-wire #8 and #6 NM cable, and it will take any other cable up to 21/32 inch wide. If your cable measures wider than 21/32 inch across the flat, you need a larger staple.
2) Can these insulated cable staples be used outdoors or in an unheated attic?
The plastic saddle on the INS66 is UV stabilized for severe weather conditions, so sun exposure and temperature swings in attics, crawlspaces, and exterior runs are within what it is built for. The fastener itself is zinc plated steel with a molded plastic insulator over the cable.
3) Why use an insulated staple instead of a plain metal cable staple on NM wire?
A plain steel staple bears directly on the cable jacket, and overdriving it can crush conductors or nick the sheath. The INS66 carries a molded plastic insulator across the cable, so the pressure lands on plastic rather than steel on jacket. That is the reason electricians reach for insulated staples on larger feeders like 6/3 and 8/3, where the jacket is thick and the staple gets driven hard.
4) Can I use the INS66 on smaller 12/2 or 14/2 romex too?
Physically it will span them, since 21/32 inch is the maximum cable width it accepts and standard 14/2 and 12/2 are well under that. But a staple sized for #8 and #6 three-wire leaves the smaller cable loose in the saddle rather than held snug, so for typical branch circuit romex a staple matched to that size holds the run better.
5) What color are Minerallac INS66 staples, and will they show against gray romex?
Silver grey. On exposed basement or garage runs that reads as a close match to gray NM jacket and to unfinished framing, which is why it is the common choice where staples stay visible.
6) How many staples come in a pack of Minerallac INS66, and are they US made?
They ship 100 to a pack under part number INS66, and country of origin is the United States. The 100 count is the unit to plan around if you are pricing out a rough-in with a fixed number of feeder runs.
7) Are Minerallac INS66 staples one piece, or do I have to assemble the insulator?
One piece. The saddle is made by plastic injection molding around the zinc plated steel fastener, so there is nothing to snap together on the job. You drive it as a single staple.
How fast can I get the Minerallac INS66 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 INS66 come with a warranty?
Absolutely. The Minerallac INS66 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 INS66?
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 Minerallac INS66 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support, and rewards on every order. Our team is always ready to help you choose the right product for your project.
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