Tube .875 x 4.5 x 5/8 thread

The U-B Machine Tube .875 x 4.5 x 5/8 Thread (Part No. 42-0423-C) is a precision-engineered suspension tube designed for firearm accessory assembly and component integration. This threaded tube delivers the dimensional consistency and material quality required for building suppressors, muzzle devices, and tactical component assemblies where repeatability and durability are non-negotiable.

Manufactured from steel with a black powder coat finish, the tube measures 4.5 inches in length with a 0.875-inch outer diameter and features a 5/8-inch–18 female thread. The black powder coat provides consistent corrosion resistance and a uniform appearance across multiple assembled units. This dimensional profile is standard in the suppressor and muzzle device manufacturing space, where OD standardization allows for compatible baffle stack construction and end-cap fitment. The 5/8-inch–18 threading accommodates established industry-standard components, ensuring integration with existing tooling and assembly fixtures.

This component serves gunsmiths, tactical accessory manufacturers, and armorer shops building or repairing sound suppressors, compensators, and flash hiders. The material specification and finish protocol support both centerfire rifle and pistol applications. Weighing just 0.3 pounds, the tube integrates seamlessly into modular suppressor designs where weight distribution and component stacking are critical to system balance and longevity.

U-B Machine is recognized for precision machining tolerances and consistent quality across OEM suppressor and muzzle device manufacturing. When ordering replacement tubes or building component assemblies from scratch, buyers should verify thread compatibility with existing baffles and end caps before assembly. Sold individually.