Gray Reducing Bush Rp 3/8 Female to Rp 1/4 Female
Gray Reducing Bush Rp 3/8 Female to Rp 1/4 Female

Brass Reducing Bush | RP 3/8" Female to RP 1/4" Female | BS21 Pneumatic Fitting

Price:
£20.48

Description

Air Compressors UK  ·  Professional Pneumatic Fittings

Brass Reducing Bush
RP 3/8" Female × RP 1/4" Female

SKU: AIR_COMP917  |  CW617N Brass  |  BS21 Parallel Thread  |  UK Stock
16 Bar Max Pressure
232 PSI Max Pressure
CW617N Brass Alloy
BS21 Thread Standard
F × F Port Configuration
Overview

The precision-machined RP 3/8" to RP 1/4" Female Reducing Bush is the definitive solution for stepping down air line diameter within professional workshop and industrial pneumatic systems. Manufactured from free-machining CW617N brass to exacting BS21 parallel thread tolerances, it delivers a leak-free, vibration-resistant seal that holds firm under sustained working pressure — without thread tape on correctly prepared ports.

Whether you are integrating a 1/4" pneumatic tool into a 3/8" manifold, rationalising a mixed-thread air line network, or commissioning a new compressor drop point, this reducing bush provides the reliable, permanent transition your system demands.

Leak-Free SealBS21 parallel thread profile ensures a metal-to-metal seal with PTFE tape or sealant on parallel-ported bodies.
High-Grade CW617N BrassCorrosion-resistant, machinable alloy rated for compressed air, nitrogen, and inert gas service.
16 Bar / 232 PSI RatedExceeds the working pressure of all standard workshop compressors and most industrial reciprocating systems.
Compact Hex BodySpanner-flat hex profile allows full torque application in confined manifold and valve block installations.
Universal CompatibilityFits all standard RP-threaded air receivers, manifolds, regulators, filters, and lubricators.
UK Stock — Fast DispatchHeld in our Manchester warehouse. Same-day despatch on orders placed before the daily cut-off.
Technical Specifications
Fitting Type Reducing Bush (Hex Body)
Inlet Thread RP 3/8" Female (BS21 Parallel)
Outlet Thread RP 1/4" Female (BS21 Parallel)
Thread Standard BS21 / ISO 7-1 Parallel Pipe Thread
Port Configuration Female × Female
Body Material CW617N Free-Machining Brass
Finish Natural Brass (Unlacquered)
Max Working Pressure 16 Bar (232 PSI)
Media Compatibility Compressed Air, Nitrogen, Inert Gases
Temperature Range -20°C to +120°C
Drive Hex Spanner Flats
SKU AIR_COMP917
Country of Origin United Kingdom / EU
Barcode AC015014875420080
Standards & Compliance: This fitting is manufactured to BS21 / ISO 7-1 parallel pipe thread standards. RP (Parallel) threads do not self-seal on the thread form — always apply quality PTFE tape or anaerobic thread sealant to the male thread before assembly. Do not use on tapered (BSPT/NPT) ported bodies without appropriate adapters.
Typical Applications

This reducing bush is the standard solution for the following installations:

Connecting 1/4" pneumatic tools to 3/8" air line manifolds
Reducing air receiver outlet ports for smaller-bore distribution
FRL unit (Filter-Regulator-Lubricator) port adaptation
Workshop, garage, and fleet maintenance air line installations
Industrial production line pneumatic circuit rationalisation
Spray gun, sander, grinder, and impact wrench feed lines
🇬🇧 UK Stock
⚡ Fast Dispatch
🔩 BS21 Compliant
🏭 Trade Grade
📦 Secure Packaging

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