Panduit SH781 StrongHold Anti-Rattle Support Bracket for BX and Armored Cable

Overview

The Panduit SH781 is a vibration-dampening cable and conduit support bracket from the Panduit StrongHold line, engineered to eliminate noise and movement in BX cable, armored cable (MC/AC), EMT, and rigid conduit runs. If you've ever walked a commercial mechanical or electrical room and heard conduit rattling against metal stud framing, that's exactly the problem the SH781 solves — it mechanically isolates the cable from the wall stud to kill vibration transmission. The bracket mounts directly to metal stud walls using included self-tapping screws, so no pre-drilling or separate hardware sourcing is required. Sold in packs of 100, the SH781 is sized for contractors and systems integrators stocking out multi-room or multi-floor runs.

Key Features

• Anti-Rattle Vibration Dampening: The bracket's design mechanically decouples cable from metal stud walls, preventing vibration energy from transmitting into the structure. In HVAC-heavy or industrial environments, this eliminates the low-frequency rattle that plagues unsupported conduit runs — reducing callbacks and noise complaints after installation.
• Supports Cable Up to 1" Diameter: Handles BX, MC/AC, EMT, and rigid conduit up to 1 inch in diameter, covering the majority of branch-circuit and low-voltage runs in commercial wall assemblies. Check your conduit OD before ordering if you're running trade-size 3/4" or larger rigid — the 1" cap is the hard limit.
• Galvanized Steel Construction (2.88" × 2"): At 73.2mm tall and 50.8mm wide, the SH781 is compact enough to fit standard stud bays without fouling adjacent runs. Galvanized steel provides corrosion resistance appropriate for interior commercial use — damp utility rooms, above-ceiling plenums, and similar environments where bare steel would rust over time.
• Self-Tapping Screws Included: Eliminates the need for a separate hardware kit. The bracket installs directly into metal stud flanges using the included fasteners — one less item to track on the job site.
• RoHS-Compliant Materials: The SH781 meets RoHS requirements, which matters on government, healthcare, and EU-destined projects where material compliance documentation is part of project closeout. Panduit publishes this at the SKU level, so it's documentable.
• 100-Piece Pack Quantity: Priced and packaged for volume installations. A single pack covers a typical 10–15 room commercial tenant improvement with standard branch circuit density. Carton quantity of 1,000 is available for large-scale projects or distributor stocking.
• Cross-Reference to E781: Direct drop-in equivalent to the Thomas & Betts / Carlon E781, so it integrates into existing material specs and submittal packages without revision if the job was originally written around the E781.

Integration & Compatibility

The SH781 installs on metal stud framing (standard commercial light-gauge steel stud construction) and is compatible with cable and conduit support applications involving BX cable, MC/AC armored cable, EMT, and rigid conduit up to 1" OD. It is not designed for unistrut or channel framing — for those applications, look at Panduit's channel-mount conduit clamp offerings. For high-density conduit bundles or larger trade sizes, consider pairing with a Panduit cable management accessory from the same StrongHold family to maintain consistent submittal documentation across the project.

What's in the Box

• 100× Panduit SH781 anti-rattle support brackets (galvanized steel)
• Self-tapping mounting screws (included per Panduit product description)

Frequently Asked Questions

Q: What cable and conduit types does the SH781 support?

A: The SH781 supports BX cable, armored cable (MC/AC), EMT, and rigid conduit up to 1 inch in outside diameter. It mounts to metal stud walls.

Q: Does the SH781 come with mounting hardware?

A: Yes. Self-tapping screws are included, so no separate fastener kit is required for metal stud installation.

Q: Is the SH781 RoHS compliant?

A: Yes. Panduit lists the SH781 as RoHS-compliant, which satisfies material compliance requirements on government, healthcare, and EU-bound projects.

Q: What is the package quantity for the SH781?

A: The SH781 ships in packs of 100. The full carton quantity is 1,000 pieces for high-volume or distributor orders.

Q: Is the SH781 a direct replacement for the Thomas & Betts E781?

A: Yes. The SH781 is a cross-referenced equivalent to the E781, making it a documented drop-in for projects originally specified around that part number.

Marty Allison

The SH781 is one of those parts that shows up on a project spec and nobody questions it — until you're on a callback six months after turnover because the armored cable runs in a mechanical room are vibrating against the studs at 60Hz. Panduit built the SH781 specifically for that scenario: galvanized steel construction, compact 2.88" × 2" footprint, and a clamping geometry that mechanically isolates conduit from the stud flange rather than just holding it in place.

Technical Highlights:

• 1" Max Cable OD: Covers BX, MC/AC, and EMT through 1" trade size — the bulk of branch-circuit and low-voltage runs in commercial stud-wall construction. Verify OD before specifying on 3/4" rigid, which can run close to the limit depending on manufacturer.
• Galvanized Steel Finish: Appropriate for interior damp locations — utility rooms, above-ceiling plenums, and mechanical chases where bare steel corrodes within a year. Not rated for direct outdoor or submerged exposure.
• 100-Piece Pack / 1,000-Piece Carton: The 100-piece pack is sized for a mid-size commercial job; the 1,000-piece carton suits high-rise or campus-scale conduit programs where per-unit cost matters at volume.

Deployment Considerations:

• The SH781 requires metal stud framing as the substrate — the included self-tapping screws are designed for light-gauge steel, not wood studs or masonry. Have appropriate anchors on hand if the wall type varies across your run.
• The E781 cross-reference is useful for submittal substitution, but confirm with the engineer of record on specification-locked projects before swapping — some specs are written with specific manufacturer intent.

Best fit for commercial electrical contractors and low-voltage integrators running conduit in metal-stud commercial interiors — particularly mechanical rooms, electrical closets, and above-ceiling cable trays where vibration-induced noise is a known post-occupancy complaint.