JHHOK58 J-Hook with Large Knock-On Steel Beam Clamp (5/16″ x 1/2″) by Doc's Industries Inc.

The JHHOK58 J-Hook with Large Knock-On Steel Beam Clamp is a galvanized steel cable support assembly for structural flanges measuring 5/16" to 1/2" thick. Hook and Hanger supplies this hardware for contractors, foremen, and datacom installers who need fast overhead support for compliant cable management in commercial plenum pathways.

Each unit combines a steel J-hook with a patented spring steel HOK-58 large knock-on beam clamp, creating a heavy-duty anchor for data comm and low-voltage cables. The component is cULus listed, NEC and TIA compliant, and plenum-rated for air-handling spaces. It is optimized for CAT 5e, CAT 6, and fiber optic routes and assembled in the USA with global components.

What Is the JHHOK58 J-Hook with Large Knock-On Steel Beam Clamp Used For?

The JHHOK58 J-Hook with Large Knock-On Steel Beam Clamp establishes cable support without drilling steel or setting separate fasteners through the flange. We stock it for organized, accessible overhead pathways.

• Secures to structural flanges between 5/16" and 1/2" thick using the integrated spring steel HOK-58 clip.

• Supports high-speed data, voice, security, audiovisual, and other low-voltage cabling.

• Helps maintain cable bend radius and pathway separation in structured cabling layouts.

• Reduces installation steps because the clamp and J-hook arrive as one assembled component.

• Fits routes above framing, mechanical areas, and suspended ceiling spaces.

What Are the JHHOK58 J-Hook with Large Knock-On Steel Beam Clamp Specifications?

Hook and Hanger offers multiple hook sizes using the HOK-58 large knock-on beam clamp to match support to cable volume. The JHHOK58 J-Hook with Large Knock-On Steel Beam Clamp is made from galvanized steel, finished with yellow zinc chromate, built around a patented design, and assembled in the USA with global components.

• JH-12HOK58: 3/4" Size | Load Capacity: 17 lbs. | Support Capacity: 16 CAT 5e / 2-strand fiber optic, or 10 CAT 6. | Packaging: 100 PCS per box.

• JH-21HOK58: 1 5/16" Size | Load Capacity: 17 lbs. | Support Capacity: 50 CAT 5e / 2-strand fiber optic, or 32 CAT 6. | Packaging: 100 PCS per box.

• JH-32HOK58: 2" Size | Load Capacity: 17 lbs. | Support Capacity: 80 CAT 5e / 2-strand fiber optic, or 50 CAT 6. | Packaging: 100 PCS per box.

• JH-64HOK58: 4" Size | Load Capacity: 50 lbs. | Support Capacity: 300 CAT 5e / 2-strand fiber optic, or 185 CAT 6. | Packaging: 25 PCS per box.

How Does the JHHOK58 J-Hook with Large Knock-On Steel Beam Clamp Attach to Overhead Structure?

The HOK-58 spring steel clip installs by being driven onto the steel flange edge. It is sized for thicker structural flanges from 5/16" to 1/2", for direct placement at the point of use. Once seated, the clamp grips the flange and holds the J-hook for cable placement.

For installers evaluating this product alongside overhead drilling and anchoring operations, the clip provides a stable, non-destructive, rapid mount. The installer can tap the clamp into place without a drilled hole, expansion anchor, or separate threaded connection, supporting faster overhead layout work.

Hook and Hanger supplies related beam clamps and angle clips for projects where the structure changes from steel flange attachment to deck, purlin, angle, or rod-supported points. This assembly is most useful when the route follows thicker beam flanges and the J-hook must align with the planned cable pathway.

Why Use JHHOK58 J-Hook with Large Knock-On Steel Beam Clamp Supports in Plenum Spaces?

The support is plenum-rated, making it suitable for approved air-handling spaces where material selection matters for inspection and documentation. In plenum environments, components above the ceiling must support cabling while meeting space requirements. These metal supports help keep low-voltage cable off ceiling grid members, ductwork, sprinkler pipe, and building systems not intended to carry cable load.

NEC and TIA compliance is important because structured cabling systems need support methods that protect cable performance, routing access, and serviceability. Using a listed J-hook support helps the project team document the pathway with hardware intended for data centers, office interiors, healthcare spaces, schools, and retail buildouts where inspections and cable changes are expected.

We supply this product for datacom crews that need a fast attachment method for steel flange conditions. Hook and Hanger also supports other overhead requirements with purlin clips, j-hooks, extension poles, eye lag screws, and threaded rod fasteners to keep the support layout consistent across changing site conditions.

Order JHHOK58 J-Hook with Large Knock-On Steel Beam Clamps From Hook and Hanger

Choosing Hook and Hanger means equipping your construction crews with dependable, code-compliant overhead support parts designed to perform on demanding jobsites. By integrating the exact engineering, high-tensile structure, and advanced material compatibility of this specific support system into your project plans, you secure an efficient, hassle-free installation backed by a specialist team focused entirely on practical hardware solutions.

To purchase your JHHOK58 J-Hook with Large Knock-On Steel Beam Clamp inventory or to explore our complete selection of alternative purlin clips, beam clamps, eye lag screws, and threaded rod fasteners, visit hookandhanger.com today. For technical support, bulk pricing tiers, or submittal documentation, call our specialist team at 805-583-9920 or email info@hookandhanger.com.