25mm Metal 1 Gang Back Box

The SB251 is a durable 1-gang, 25mm deep steel flush back box designed for the secure installation of switches, sockets, and other standard electrical accessories in solid walls. Manufactured from high-quality galvanised steel, it offers excellent strength, corrosion resistance, and long-lasting performance for domestic, commercial, and industrial electrical installations. Its compact 25mm depth is ideal where wall space is limited, while multiple 20mm knockouts provide flexible cable entry for a quick and efficient installation. Conforms to BS 4662 for reliability and safety.

Key Features:

• 1-gang flush steel back box
• 25mm depth for shallow wall installations
• Manufactured from robust galvanised steel
• Suitable for standard 1-gang switches, sockets, and wiring accessories
• Multiple 20mm knockouts for flexible cable entry
• Includes brass earth terminal
• Adjustable and fixed lugs for secure accessory mounting
• Corrosion-resistant finish for long service life
• Complies with BS 4662 standards for electrical back boxes.