Empire 23LB0038 C-clamp Locknut 400 Lb Ductile Iron

Product Description

The EMPIRE 23LB0038 is a C-Clamp with Locknut designed for securing threaded rod to structural flanges in mechanical, HVAC, and plumbing support systems. Built from ductile iron, it delivers a 400 lb load capacity with a maximum flange thickness of 3/4 inches and accepts 3/8 inch rod. The locknut provides positive rod engagement to prevent loosening under vibration or dynamic loading. This hardware is a standard component in suspended pipe and equipment hanger assemblies across commercial and industrial construction. It carries cULus, UL-U.L.C., and FM Approved listings, as well as MSS SP-69 and SP-58 compliance, making it suitable for code-required installations.

The 23LB0038 is used in suspended hanger systems where a threaded rod must be anchored to a beam flange or structural steel. Typical applications include HVAC duct support, plumbing pipe hangers, and mechanical equipment suspension in commercial and light industrial settings. It is sized for 3/8 inch threaded rod, which is common in medium-duty hanger runs. The ductile iron construction handles the mechanical stress of loaded hanger assemblies while resisting the impact and vibration common in mechanical rooms and overhead installations.

Key Features

• 400 lb load capacity for reliable medium-duty suspension support
• 3/4 inch maximum flange thickness suits standard structural steel beam flanges
• Accepts 3/8 inch threaded rod, a common size in commercial hanger systems
• Ductile iron construction for strength and impact resistance
• Integrated locknut prevents rod from loosening under load or vibration
• cULus Listed, FM Approved, MSS SP-69 (Type 23), SP-58, and UL-U.L.C. Listed

Compatibility

Designed as an OEM-style hanger component compatible with standard 3/8 inch threaded rod hanger assemblies meeting MSS SP-69 and SP-58 specifications in mechanical, HVAC, and plumbing support systems.

Installation Notes

Installation is performed by licensed plumbers, pipefitters, or HVAC mechanics as part of overhead hanger and support systems. Ensure structural steel or beam flange thickness does not exceed 3/4 inches before seating the clamp. Confirm the hanger assembly is fully de-loaded and the work area is safe before adjusting or repositioning the clamp. Follow applicable codes including IFGC, IPC, and NFPA 90A/90B for hanger spacing and load requirements.