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Need help? Call Us +441282 270214 or email Sales@aircompressorsuk.uk
Description
RP 3/8″ to RP 1/4″ Female Reducing Bush
Premium Brass Pneumatic Adapter for Professional Air Systems
Engineered for precision and durability, this RP 3/8″ female to RP 1/4″ female reducing bush delivers reliable thread adaptation in demanding pneumatic environments. Manufactured from high-grade brass with BS21 parallel thread compliance, it's the professional's choice for workshop air systems, production lines, and mobile service applications.
Technical Specifications
- Thread Type: RP (BS21 Parallel)
- Inlet Size: 3/8″ Female (BSP Parallel)
- Outlet Size: 1/4″ Female (BSP Parallel)
- Material: High-Grade Brass (CW617N)
- Finish: Natural Brass
- Working Pressure: Up to 16 bar (232 psi)
- Temperature Range: -20°C to +120°C
- Thread Standard: BS21 / ISO 228-1
Key Features
- ✓ Precision-machined brass construction for long service life
- ✓ BS21 parallel thread ensures leak-free connections
- ✓ Corrosion-resistant for harsh workshop environments
- ✓ Compatible with PTFE tape and thread sealant
- ✓ Hex body for secure installation with standard spanners
- ✓ UK stock – same-day dispatch available
Professional Applications
Workshop Air Systems
Adapt manifold outlets to smaller diameter hose connections, enabling flexible tool positioning and efficient air distribution across workstations.
Pneumatic Tool Integration
Connect 1/4″ quick-release couplers to 3/8″ air supply lines, maintaining optimal flow rates while reducing connection points.
Compressor Manifolds
Step down from primary 3/8″ distribution headers to secondary 1/4″ branch lines for pressure gauges, filters, and regulators.
Mobile Service Rigs
Create compact, reliable connections in space-constrained mobile compressor setups where thread size adaptation is essential.
Installation Best Practices
- Thread Preparation: Clean both male and female threads thoroughly. Remove any debris, old sealant, or corrosion.
- Sealant Application: Apply 2-3 wraps of PTFE tape clockwise (viewing thread end-on) or use liquid thread sealant rated for compressed air.
- Hand Tightening: Thread the reducing bush hand-tight into the 3/8″ female port until resistance is felt.
- Final Torque: Use appropriate spanners to tighten 1-1.5 turns past hand-tight. Avoid over-torquing which may damage threads.
- Pressure Test: Pressurize system gradually and check for leaks using soapy water solution before full operation.
Thread Compatibility Reference
This reducing bush features RP (Parallel) threads on both ends, conforming to BS21 / ISO 228-1 standards. RP threads are designed for parallel sealing using PTFE tape or sealant, unlike tapered R/BSPT threads which seal metal-to-metal.
Note: While RP parallel female threads can mate with R tapered male threads, both connections on this bush are female and require male threaded components. Ensure your mating fittings are RP or R male threads in the corresponding sizes.
Quality & Compliance
Every reducing bush is manufactured to exacting tolerances using CW617N brass alloy, selected for its superior machinability, corrosion resistance, and mechanical strength. Our fittings meet BS21 dimensional standards and are suitable for compressed air, inert gases, and non-corrosive fluids within the stated pressure and temperature parameters.
UK Stock & Fast Dispatch
Held in our UK warehouse for immediate availability. Orders placed before 2 PM are dispatched same-day via Royal Mail or courier service. We understand downtime costs money – that's why we prioritize rapid fulfillment for trade customers and workshops.
Trade & Bulk Pricing
Regular user? We offer competitive pricing for bulk orders and trade accounts. Contact us to discuss volume discounts, scheduled deliveries, and account terms tailored to your business requirements.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.