Generic 1 Inch GI Back Nut, Galvanized Iron, BSP Thread

1 Inch GI Back Nut

The Generic 1 Inch GI Back Nut serves as a robust mechanical fastener for securing threaded pipe and fittings against surfaces like water tanks, panels, or bulkheads. This plumbing component provides the necessary tension to hold faucets or valves in place, ensuring the assembly remains rigid under hydraulic pressure. It is a standard requirement for 25mm galvanized pipe installations in both commercial and residential sectors.

Built for the Job

On-site, contractors use this hardware to create a tight seal when a pipe passes through a wall or a tank wall. The nut acts as a locking mechanism that prevents the pipe from shifting or rotating during operation. In irrigation systems, it secures risers and sprinkler heads to main lines. The heavy-duty iron construction withstands the rigors of high-pressure water systems without the risk of thread stripping or structural failure. Plumbers often pair this with a rubber washer or hemp sealant to ensure a watertight connection at the bulkhead. The wide flange surface area allows for even pressure distribution, which is essential when sealing against plastic tanks or thin metal plates to prevent cracking or deformation.

• Securing tank connectors in gravity-fed water systems.

• Locking faucets and valves to mounting brackets or industrial panels.

• Stabilizing pipe penetrations in pump houses and irrigation manifolds.

Product Highlights

Corrosion Resistance

The hot-dip galvanized finish provides a thick layer of zinc protection that prevents rust in high-moisture environments.

Thread Integrity

• Precision-machined 1-inch BSP internal threads for universal compatibility.
• Clean-cut entry points to prevent cross-threading during rapid site installation.

Technical Specifications

What’s Included

• 1 x 1-Inch Galvanized Iron Back Nut

On-Site & Workshop Notes

• Check the thread pitch before installation to ensure a smooth fit with the male pipe end.

• Use a standard pipe wrench for the final quarter-turn to lock the fitting against the surface.

• Avoid over-tightening on plastic tanks to prevent stress fractures in the tank wall.

• Store these components in a dry area to maintain the integrity of the protective zinc coating before use.

• The hexagonal shape is designed to accommodate standard adjustable spanners without rounding the corners.