Brass Reducing Union R 1/2 to R 3/8 BSP Male | Nickel-Plated Pneumatic Fitting | UK Stock

When your air system demands a precise step-down between a half-inch supply line and a three-eighths outlet, this reducing union delivers without compromise. Machined from solid brass and finished with a nickel-plated coating for long-term corrosion resistance, it is the fitting that professional workshops, fleet maintenance bays, and production facilities reach for when reliability is non-negotiable.

• Precision-machined brass body — ensures dimensional accuracy and a leak-free seal under sustained pressure cycles
• Nickel-plated finish — provides superior corrosion resistance in humid workshop environments and outdoor installations
• BSP-compliant threads — compatible with the full range of British Standard Pipe fittings, couplings, and manifolds
• 16 bar working pressure — rated well above typical workshop compressor output (6–10 bar), giving a safe operational margin
• Wide temperature tolerance — performs reliably from cold-start conditions to high-cycle industrial environments
• Compact reducing profile — minimises dead volume and pressure drop across the transition, maintaining downstream tool performance

• Apply PTFE thread tape to both male threads before assembly — wrap clockwise (2–3 turns) for a pressure-tight seal
• Hand-tighten first, then use a spanner to achieve a firm, snug fit — do not over-torque brass fittings
• Depressurise the air line fully before installation or removal
• Inspect threads for damage before fitting; replace if any deformation is present
• Compatible with compressed air, inert gases, and water (non-potable) within the rated pressure and temperature range