Post Holders | McMaster-Carr

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I-Slotted/Single Flanged

Clamp-On Framing Component

Add-On Through-Hole Adapter

Add-On Through-Hole Connector

Add-On Through-Hole Rail Support

DFARS Specialty Metals

Exempt

Export Control Classification Number (ECCN)

EAR99

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332 Products

Sign Posts, Bases, and Brackets

Sign-Mounting Brackets

Mount a sign to a 1 1/8" to 1 3/4" diameter post.

Large-Diameter Sign-Mounting Brackets

Mount a sign to a 4" to 12" diameter post or column.

Sign Post Mounting Pegs

Bolt these pegs directly into the ground.

Structural Framing

Light Duty Aluminum
Telescoping Framing and Fittings

Create lightweight adjustable structures. With telescoping aluminum rails, this framing is often used to make folding stands, extension poles, and sign frames.

Clamp-On Framing and Fittings

Fittings come in two pieces to wrap around rails, so you can quickly modify existing structures without disassembling. Use clamp-on framing and fittings to form temporary partitions, modular conveyors, and workstations.

Heavy Duty Clamp-On Framing and Fittings

Make workstations, conveyors, and shelving for heavy loads. These clamp-on framing rails and fittings are the thickest and sturdiest in our offering.

Press-Fit Framing and Fittings

No need for fasteners—friction holds this framing together. Use press-fit framing and fittings to assemble carts, enclosures, and partitions.

Scaffold Clamps

Build tube-and-clamp scaffolding and attach supports, such as railings, to frame-style structures. Also known as knuckles. These clamps fit the most common scaffold tube sizes.

Sign Posts, Bases, and Brackets

Sign-Mounting Brackets

Large-Diameter Sign-Mounting Brackets

Sign Post Mounting Pegs

Structural Framing

Light Duty AluminumTelescoping Framing and Fittings

Clamp-On Framing and Fittings

Heavy Duty Clamp-On Framing and Fittings

Press-Fit Framing and Fittings

Scaffold Clamps

Scaffold Clamps

Light Duty Aluminum
Telescoping Framing and Fittings