Strut Channel Accessories Guide

Strut channel is the C-shaped metal framing channel (often called by the brand name Unistrut) that lets you build supports and frames without welding. The accessories are what make it work: the nuts, clamps, fittings, and brackets that bolt into the channel slot. This guide walks through each accessory family, what it does, and how to pick the right one. Everything we stock fits the standard 1-5/8" profile and is compatible with Unistrut and other major brands.

Channel Nuts & Spring Nuts

The channel nut is the heart of the system. It drops into the channel slot and locks a quarter-turn against the inturned lips, giving you a threaded anchor anywhere along the run. Most have a spring that holds the nut in place while you start a bolt. The spring length matches the nut to the channel depth: regular spring for standard 1-5/8" channel, long spring for deep 3-1/4" channel, short spring for shallow 13/16" channel, and no-spring for any depth when you can reach in to hold it.

Full detail in the Channel Nut & Spring Nut Guide. Shop strut channel nuts — common picks: STR4118 (1/4-20 regular spring), STR4124 (1/2-13 regular spring), STR4168 (3/8-16 no spring).

Beam Clamps

Beam clamps grip the flange of a steel beam to give you an attachment point for threaded rod, strut, or pipe — no drilling or welding. Universal and wide-throat malleable clamps are the everyday rod-hangers; I-beam clamps come in light, medium, and heavy duty; C-clamps offer a quick set-screw attachment; window clamps reach the top of a flange.

See the Beam Clamp Selection Guide. Shop beam clamps — e.g. STR5103 (3/8 universal malleable), STR4815 (1/4 I-beam clamp).

Pipe, Conduit & Cushion Clamps

Pipe clamps bolt into strut to support pipe, conduit, and tube along a run. Universal clamps fit both EMT and rigid conduit; dedicated EMT, rigid, OD, and copper clamps give the tightest fit by type. Cushion clamps add a plastic insert that damps vibration, isolates dissimilar metals, and lets the line move quietly with temperature.

See the Pipe & Cushion Clamp Sizing Guide. Shop pipe & conduit clamps and cushion clamps.

Channel Fittings

Fittings are the plates and angles that join strut into frames: flat splice and corner plates to connect in-plane, 90-degree corner and shelf angles to turn corners, U and Z supports to span and offset, and wing fittings for multi-plane connections. They all bolt on with channel nuts.

See the Strut Fitting Reference. Shop channel fittings.

Brackets, Braces & Post Bases

Brackets carry loads off a wall or post (shelf brackets, cantilever arms); braces stiffen a frame against racking (flat, diagonal, and adjustable braces); post bases anchor a strut post to the floor or wall so it can stand as a column. Together they let you build free-standing structures from strut.

Shop brackets & braces and post bases. For load basics see How Much Weight Can Strut Hold.

Trolleys, End Caps & Hardware

Trolleys roll inside strut used as a track for sliding doors, curtains, and light material handling. End caps close off cut strut ends safely; joiners and splice plates extend runs; clevis hangers and pipe rollers support pipe; gate hangers and outlet boxes handle specialty jobs.

Shop trolleys & track and end caps & hardware.

Finishes

Match the finish to the environment: electro-galvanized zinc for interior/dry, hot-dip galvanized for exterior, 316 stainless for wet and coastal, aluminum for light weight. Details in the Strut Finishes & Materials Guide.

Matching Another Brand

Strut accessories interchange across brands at the same profile. If you have a Unistrut, B-Line, PowerStrut, or SuperStrut part number, use our Strut Brand Cross-Reference to find the Eugene Fastener equivalent.

Frequently Asked Questions

What are the main strut accessories?

The core families are channel nuts (the threaded anchors), beam clamps (attach to steel beams), pipe and conduit clamps (support pipe), cushion clamps (vibration isolation), channel fittings (plates and angles that join strut), brackets and braces (carry load and stiffen frames), post bases (stand a post up), trolleys (roll loads on strut track), and end caps and specialty hardware.

Do I need special tools to assemble strut?

No. Strut bolts together with channel nuts and a wrench or socket. You cut channel to length with a hacksaw or chop saw, deburr the cut, and bolt on fittings. No welding or drilling of the strut is required, which is the main reason strut is so widely used.

How do I choose the right channel nut spring?

Match the spring to the channel depth: regular spring for standard 1-5/8 inch channel, long spring for deep 3-1/4 inch channel, short spring for shallow 13/16 inch channel. No-spring nuts work in any depth when you can hold the nut by hand. The spring is only a holding aid; it does not change strength.

Will accessories from one brand fit another brand's strut?

Yes, as long as they share the standard 1-5/8 inch profile. Nuts, fittings, and clamps interchange across Unistrut, B-Line, PowerStrut, SuperStrut, and others at the same size. That is why a brand cross-reference is useful when matching an existing run.

Related Guides

• Channel Nut & Spring Nut Guide
• Beam Clamp Selection Guide
• Pipe & Cushion Clamp Sizing Guide
• Strut Fitting Reference
• How Much Weight Can Strut Hold
• Strut Finishes & Materials
• Strut Brand Cross-Reference