Eaton B321-3ZN Beam Clamp - cULus Listed, 1600 lb
Part Number: B321-3ZN
Quick Summary
Eaton B-Line beam clamps provide secure, adjustable mounting for support structures in commercial and industrial electrical installations. Installers often face challenges matching 5/8-11 hardware to a 0.313 inch beam thickness and ensuring consistent load margins across retrofit projects. This clamp is cULus Listed and rated for 1600 lb, with a built-in safety factor of 5 to support critical infrastructure. Its compatibility with standard 5/8-11 thread and the B-Line strut system delivers predictable performance in demanding environments. By simplifying alignment and reducing field adjustments, it speeds up installation, minimizes rework, and supports scalable luminaires, conduit runs, and mechanical supports across healthcare, data centers, and manufacturing facilities.
Product Information
Extended Description
B321-3ZN Eaton: Eaton B-Line series beam clamps, 3.5625"Hx3.25"Lx0.6250"W, Steel, 1600 load cap, 5/8"-11 rod size, 5/8"-11 screw size, 0.313"beam thickness
Product Name
Eaton B-Line series beam clamps
Catalog Number
B321-3ZN
UPC
781011531331
Product Length/Depth
3.25 in
Product Height
3.5625 in
Product Width
0.625 in
Product Weight
1.85 lb
Certifications
cULus Listed
Beam thickness
0.313 in
Set screw size
5/8"-11
Special features
Safety factor of 5, setscrew included
Thread/rod size
5/8"-11
Type
Beam clamp
Load capacity
1600 lb
Material
Steel
Feature: The B321-3ZN delivers a 1600 lb load capacity and uses standard 5/8-11 thread hardware with an included setscrew. Business Impact: Ensures a secure, vibration-resistant connection that maintains alignment through commissioning and operation, reducing field adjustments and service calls. Application: Ideal for heavy luminaire supports, conduit racks, and equipment mounts within Eaton B-Line strut channels in data centers, manufacturing floors, and industrial facilities alike. Feature: Precise clamp geometry for a 0.313 inch beam thickness. Business Impact: Delivers consistent clamping force without deforming the beam, preserving the structural integrity of the channel system and extending component life. Application: Retrofit and new-build installations where standard beams are used, enabling rapid pairing with compatible rods and screws. Feature: Steel construction with durable finish. Business Impact: Withstand indoor electrical environments and repeated assembly cycles, lowering maintenance cost and replacement frequency. Application: Electrical rooms, switchgear areas, and overhead support runs in warehouses and plant floors that demand reliable performance. Feature: cULus Listed certification and compliance. Business Impact: Simplifies procurement and risk management by meeting recognized safety standards, reducing time on audits and qualification tests. Application: Projects governed by UL safety requirements in North America, including healthcare, data centers, and manufacturing. Feature: Quick installation with standard hardware and clear specifications. Business Impact: Shortens project timelines, lowers labor costs, and improves overall project ROI. Application: New builds and retrofit campaigns where fast, repeatable installs are critical for on-time commissioning and scalable expansion. Feature: Broad compatibility with the B-Line catalog components and accessories. Business Impact: Enables modular system design, easier stocking, and scalable optimization across multiple projects. Application: Installers planning lifecycle management and procurement that favors standardized Eaton components.
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FAQs
The B321-3ZN is designed for 5/8-11 threaded rods and screws and fits beams designed for the 0.313 inch beam thickness. Its included setscrew ensures secure bite, while the clamp geometry maintains alignment under dynamic loads typical in luminaires and conduit runs. This compatibility supports reliable, repeatable installations in B-Line strut channel systems.
Yes, the B321-3ZN is cULus Listed, confirming compliance with recognized safety standards for North American electrical installations. This certification simplifies procurement, auditing, and compliance checks for facilities operating under UL and CSA guidelines, making it suitable for data centers, healthcare facilities, and manufacturing plants.
The clamp supports a load capacity of 1600 lb and is designed for a beam thickness of 0.313 inches. This combination provides a robust, high-margin connection for heavy luminaires and conduit assemblies while maintaining structural integrity and minimizing beam deformation during service life.
Installation uses standard 5/8-11 hardware with an included setscrew, enabling quick engagement without specialty tools. The clamp’s precise geometry aligns with existing B-Line components, reducing on-site adjustments, rework, and downtime during retrofit campaigns or routine maintenance in electrical rooms and industrial facilities.
Industries such as data centers, manufacturing, warehousing, and healthcare benefit from the B321-3ZN due to its high load rating, reliable cULus certification, and compatibility with common strut channel systems. It supports luminaires, conduit racks, and mechanical supports, delivering scalable, cost-effective mounting solutions for complex electrical installations.