

Ships same day if ordered by 12 pm
Manufacturer pricing rules prevent us from advertising our discount — no account or email required to see it.
Secure Payments
Easy Returns
Expert Advice
Fast Shipping
The NVENT 512HDXT is an extension bracket designed for use with heavy duty T-grid box hangers in acoustical ceiling installations. It serves as an attachment accessory that accommodates deep electrical boxes where standard hangers fall short. The bracket supports 3 5/8 inch deep electrical boxes, and can also be used with 2 1/8 inch boxes paired with a 1 1/2 inch extension ring. Electricians working in suspended ceiling environments rely on this type of hardware to maintain secure, code-compliant box positioning within T-grid ceiling grid systems.
This extension bracket is used in commercial and residential acoustical ceiling installations where electrical boxes must be properly supported within the T-grid structure. It is particularly suited for retrofit and new construction scenarios where deep outlet or junction boxes are being mounted overhead. The bracket integrates with the heavy duty T-grid hanger system to provide a stable platform for the electrical box without compromising ceiling grid integrity.
Designed for use with heavy duty T-grid box hanger systems in acoustical ceiling installations, supporting 3 5/8 inch deep electrical boxes or 2 1/8 inch boxes with a 1 1/2 inch extension ring.
Installation is typically performed by a licensed electrician in accordance with NEC requirements for electrical box support in suspended ceiling systems. Power should be shut off at the panel before working on or near any energized box. Ensure the T-grid ceiling grid is properly seated and the hanger is rated for the load before attaching the extension bracket. Do not exceed the rated load capacity of the hanger assembly.
Thanks for subscribing!
This email has been registered!