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AMSI H-Bracket


QUICK MOUNT™  Box Support



Part NumberModelBox FitmentMetal Stud SizePer BoxPrice
H234″sq. & 4-11/16″2-1/2″ or 3-1/2″100


H44″sq. & 4-11/16″4"100


H64″sq. & 4-11/16″6"100


Easy Installation

A. Place box support between the electrical box and plaster ring.

B. Attach plaster ring to box and secure fasteners.

C. Position the offset in the box support over the stud as shown. Bend the support leg to the H23 box support for 2-1/2″ studs as required.

D. Align the “V” notch at the center line of the support box with box location marked on stud. Attach box support to stud using two self-tapping screws.

Do not over-torque


You Will Need These Tools


Do Not Feed Romex (Non-Metallic Sheathed Cables) Through Hole in Support Leg of Box Support


  1. AMSI products shall be installed and used only as indicated in AMSI product installation materials. Instructions sheets are available no charge HERE and from your AMSI customer service representative or by calling 1-800-943-9771.
  2. AMSI products must never be used for purpose other than that for which they were designed.
  3. All AMSI instructions must be followed completely to ensure a safe and proper installation and meet all performance requirements.
  4. Improper or intentional installation, misuse, misapplication or other failure to completely follow AMSI’s instructions and warnings may cause the product to malfunction, may cause property damage, and may cause serious bodily injury and death.


The customer must observe all local, state, national and international governing codes required for job site safety. Always remember to wear appropriate safety equipment, such as eye protection, hard hat, gloves and fall protection as the job requires.

The customer is responsible for conformance to all local, state, national, and international governing codes.

AMSI, “H” SERIES FASTENER, QUICK-MOUNT, H4, H6, HS3, H23, are Trademarks of Architectural Metal Specialties, Inc.