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SKU 7000059407
Legacy SKU 98040055182
UPC 00051115187520
Part Number PT4SMB
Product Number PT4SMB

3M™ Fire Barrier Pass-Through Brackets Square are designed for use in conjunction with the 3M™ Fire Barrier Pass-Through Device to support and strengthen firestop through penetration installations. Metal brackets come in pairs for securing the device on each side of the wall or floor assembly. Square brackets are also available for three-plex and six-plex pass-through installations.

  • Designed to work in conjunction with 3M™ Fire Barrier Pass-Through Device – Square
  • Durable metal brackets add strength and support to through penetration firestop assemblies
  • Brackets come in pairs for securing the device on each side of the penetration
  • Brackets are also available sized for stacked three-plex and six-plex square device configurations
  • Includes bracket screws for consistency and convenience
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On it's way to you October 3   


Minimum Order 24 Items
Order Increment 24 Items
  Immense Fire Resistance
  UL Certified
  Fast Shipping
  Industry Low Price
Product Dimensions
Imperial Metric
Weight 0.6625 LBS
Width 4 in 102 mm
Length 4 in 102 mm
Shipping Dimensions
Weight 16.4 lb
Length 17 in
Width 12.3 in
Height 6.2 in
Color Silver


  1. What is the function of the 3M™ Fire Barrier Pass-Through Single Mounting Brackets PT4SMB?

    The 3M™ Fire Barrier Pass-Through Single Mounting Brackets PT4SMB are designed to help protect cables and other penetrating items from fire and smoke.

  2. How many mounting brackets come in a pack?

    One pack contains one pair (two) of single mounting brackets.

  3. Are these brackets suitable for industrial use or just home applications?

    These mounting brackets are suitable for both commercial and residential applications, as they provide reliable protection against fire and smoke damage.

  4. Can I purchase multiple packs at once?

    Yes, you can buy 24 pairs per case if bulk buying suits your needs better.

  5. . Are these easy to install myself or would I need professional help?

    . These mounting brackets can be easily installed yourself without needing professional help - although we're always happy to offer advice!

For industrial/occupational use only. Not for consumer sale or use.
3M industrial and occupational products are intended, labeled, and packaged for sale to trained industrial and occupational customers for workplace use.  Unless specifically stated otherwise on the applicable product packaging or literature, these products are not intended, labeled, or packaged for sale to or use by consumers (e.g., for home, personal, primary or secondary school, recreational/sporting, or other uses not described in the applicable product packaging or literature), and must be selected and used in compliance with applicable health and safety regulations and standards (e.g., U.S. OSHA, ANSI), as well as all product literature, user instructions, warnings, and other limitations, and the user must take any action required under any recall, field action, or other product use notice.  Misuse of 3M industrial and occupational products may result in injury, sickness, death, or property damage.  For help with product selection and use, consult your on-site safety professional, industrial hygienist, or other subject matter expert.
For Complete Pass-Through Firestop Installation

Designed specifically for use with the 3M™ Fire Barrier Pass-Through Device - Square, these 3M™ Fire Barrier Pass-Through Brackets add support and longevity to the entire through-penetration firestop application. Durable metal brackets are built to fit the metal enclosure and hold it securely to fire rated floors or walls for effective firestopping of critical equipment and cable systems. In addition to the single bracket, the square brackets are also available for single stacked three-plex and six-plex device configurations used for larger cable management and firestop requirements.

Recommended Applications
  • For use with 3M™ Fire Barrier Pass-Through Device - Square in fire-rated floor and wall assemblies
  • Cables – 750 kcmil, Cat 6, fiber optic, 300 pair No. 24 AWG copper telephone cable, thermostat
  • Plastic pipes – ccPVC, PVC, ENT, CPVC, FRPP, PVDF, ccABS, ABS, rigid non-metallic, PEX
  • Metal pipes – copper, steel, iron, flexible gas
  • Insulated - AB/PVC on copper line sets
  • Combinations – metallic, non-metallic and insulated pipes plus cables
  • Blank penetrations
About Fire Barrier Pass-Through Devices

These mounting brackets work in conjunction with the 3M™ Fire Barrier Pass-Through Devices, which feature a fixed fire-rated intumescent material and foam smoke seals. In the event of a fire, intumescent material quickly expands to seal the inside of the device, helping to prevent the spread of smoke, toxic gas and fire into other compartments. Smoke seals are removable, making these metal enclosures suitable for firestopping critical equipment, such as telecom, and cable systems where cables may be added or removed frequently.

Reliable and Affordable Fire Protection

Effective and easy to install, 3M™ Fire Barrier Pass-Through Brackets Square are part of 3M's family of fire protection products that offer the broadest, long-lasting solutions for a variety of commercial, industrial and residential applications. As a trusted leader in the fire protection industry, 3M offers a broad line of affordable products designed to meet the most demanding firestop requirements. Find the solution you need from the industry-preferred line of fire protection products.

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Lead times are estimates and may vary based on our suppliers' product availability.