Southwire 518 1-hole Snap-on Conduit Strap 3 Inch

Product Description

The SOUTHWIRE 518 is a one-hole snap-on conduit strap designed to secure EMT and rigid conduit runs in commercial and residential electrical installations. Fabricated from steel with a zinc-plated finish, the strap features an inverted rib construction that adds structural rigidity without increasing bulk. The snap-on design allows for fast, tool-friendly attachment to conduit before fastening to the mounting surface. This strap is sized for 3-inch trade-size conduit and is a standard component stocked and installed by licensed electricians on framing, structural steel, and concrete substrates.

This strap is suited for both EMT and rigid metal conduit systems in light commercial and residential electrical work. The zinc-plated finish provides corrosion resistance in standard indoor environments. Southwire Topaz snap-on straps are available across a range of trade sizes from 2-1/2 to 6 inches, making this 3-inch strap part of a consistent product family that electricians can source across a full conduit run without mixing hardware styles.

Key Features

• Snap-on design speeds installation and allows single-hand conduit positioning
• Inverted rib adds strength and resistance to deformation under load
• Zinc-plated steel construction for durability and corrosion resistance
• One-hole mounting configuration reduces fastener count per support point
• Compatible with both EMT and rigid conduit in 3-inch trade size

Compatibility

Designed for use with 3-inch trade-size EMT and rigid conduit. Southwire Topaz snap-on straps cover trade sizes from 2-1/2 to 6 inches across the product line.

Installation Notes

Installation is performed by a licensed electrician in accordance with NEC requirements for conduit support spacing and fastener type. De-energize any circuits in the work area before securing conduit straps near existing wiring. Fasten the one-hole strap to the structural substrate using a fastener appropriate for the surface material, such as a screw anchor for concrete or a sheet-metal screw for steel framing. Do not overtighten the mounting fastener in a way that deforms the strap body or distorts conduit alignment.

Technical Specifications

• Trade Size: 3 inches
• Conduit Type: EMT and Rigid Conduit
• Mounting Holes: 1
• Material: Steel
• Finish: Zinc Plated
• Style: Snap-On with Inverted Rib

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: 518