RS PRO Threaded Fitting, Straight Reducer Bush Reducer Bush Reducer Bush, Male BSPT 1 in to Female BSPP 1/2 in
RS Stock No. 297-2216
Brand RS Pro
- Connection 2: 1/2 in BSPP Female
- Fitting Direction: Straight
- Fitting Type: Reducer Bush
AED 122.24
in stock now
RS PRO Threaded Fitting, Straight Reducer Bush Reducer Bush Reducer Bush, Male BSPT 1 in to Female BSPP 3/4 in
RS Stock No. 297-2222
Brand RS Pro
- Connection 1: 1 in BSPT Male
- Connection 2: 3/4 in BSPP Female
- Fitting Direction: Straight
AED 121.84
in stock now
RS PRO Brass Pipe Fitting, Straight 3/4In Reducer Bush, Male BSP 3/4 in to Female BSP 1/2 in
RS Stock No. 079-8331
Brand RS Pro
- Category: Brass & Bronze Threaded Fittings
- Connection 2: 1/2 in BSP Female
- Fitting Type: Reducer Bush
AED 35.50
in stock now
RS PRO Threaded Fitting, Straight 3/8 in Reducer Bush, Male BSP 3/8 in to Female BSP 1/4 in
RS Stock No. 203-9016
Brand RS Pro
- Category: Brass & Bronze Threaded Fittings
- Fitting Direction: Straight
- Fitting Type: Reducer Bush
AED 19.04
in stock now
RS PRO Threaded Fitting, Straight 1In Reducer Bush, Male BSP 1 in to Female BSP 1/2 in
RS Stock No. 203-9044
Brand RS Pro
- Connection 1: 1 in BSP Male
- Connection 2: 1/2 in BSP Female
- Fitting Direction: Straight
AED 97.35
in stock now
RS PRO Threaded Fitting, Straight 1/2In Reducer Bush, Male BSP 1/2 in to Female BSP 1/4 in
RS Stock No. 203-9022
Brand RS Pro
- Category: Brass & Bronze Threaded Fittings
- Connection 2: 1/4 in BSP Female
- Material: Brass
AED 44.27
in stock now
RS PRO Threaded Fitting, Straight 1/2In Reducer Bush, Male BSP 1/2 in to Female BSP 3/8 in
RS Stock No. 203-9038
Brand RS Pro
- Connection 1: 1/2 in BSP Male
- Fitting Direction: Straight
- Fitting Type: Reducer Bush
AED 34.38
in stock now
Huco Reducing Bush 251.14, 5 mm OD
RS Stock No. 068-9063
Brand Huco
- Material: Brass
- Outside Diameter: 5mm
- Shaft Diameter: 3mm
AED 59.10
in stock now
Huco Reducing Bush 251.18, 5 mm OD
RS Stock No. 068-9091
Brand Huco
- Category: Reducing Bushes
- Minimum Operating Temperature: -20°C
- Outside Diameter: 5mm
AED 59.10
in stock now
Huco Reducing Bush 255.18, 8 mm OD
RS Stock No. 074-8572
Brand Huco
- Length: 8.1mm
- Material: Brass
- Outside Diameter: 8mm
AED 59.10
in stock now
Huco Reducing Bush 255.22, 8 mm OD
RS Stock No. 074-8594
Brand Huco
- Length: 8.1mm
- Maximum Operating Temperature: +60°C
- Outside Diameter: 8mm
AED 59.10
in stock now
Huco Reducing Bush 251.16, 5 mm OD
RS Stock No. 068-9085
Brand Huco
- Length: 4.3mm
- Maximum Operating Temperature: +60°C
- Shaft Diameter: 3.175mm
AED 59.10
in stock now
Huco Reducing Bush 253.14, 6.35 mm OD
RS Stock No. 068-9108
Brand Huco
- Maximum Operating Temperature: +60°C
- Minimum Operating Temperature: -20°C
- Shaft Diameter: 3mm
AED 59.10
in stock now
Huco Reducing Bush 253.15, 6.35 mm OD
RS Stock No. 068-9114
Brand Huco
- Material: Brass
- Maximum Operating Temperature: +60°C
- Shaft Diameter: 3.048mm
AED 59.10
in stock now
Huco Reducing Bush 253.16, 6.35 mm OD
RS Stock No. 068-9120
Brand Huco
- Material: Brass
- Maximum Operating Temperature: +60°C
- Shaft Diameter: 3.175mm
AED 59.10
in stock now
Huco Reducing Bush 253.18, 6.35 mm OD
RS Stock No. 068-9136
Brand Huco
- Material: Brass
- Maximum Operating Temperature: +60°C
- Outside Diameter: 6.35mm
AED 59.10
in stock now
What is a brass reducer bush?
- Inner bore diameter (ID) and outer diameter (OD)
- Overall length (L) and shoulder/ flange presence
- Thread type and size (internal/external, BSP/BSPT, NPT, metric)
- End style: plain bore, threaded bore, or flange
- Material: brass (yellow brass or red brass), corrosion resistance
- Tolerances and finishing (smooth bore, knurled or smooth outer surface)
- Operating temperature range and compatibility with fluids or lubricants
What are the main types of brass reducer bushes?
- Plain bore brass reducer bush – a slip-fit sleeve that reduces bore size without threads; ideal for press-fit or light assemblies.
- Threaded brass reducer bush (internal) – features internal threads to mate with a male-threaded shaft or pipe adapter (e.g., BSP, NPT, metric).
- Threaded brass reducer bush (external) – features external threads to accept a female-threaded component or coupling.
- Flanged brass reducer bush – includes a flange or shoulder for axial positioning and improved seating in housings.
- Combination types – some reducers combine a threaded end with a plain or flanged end to cover multiple connection methods in one part.
- Metric vs imperial – available in both metric (M) and imperial (BSP/NPT) thread standards to match regional equipment.
How do I choose the right brass reducer bush for my project?
- determine the needed inner bore size to match the shaft, pin, or pipe diameter. For a snug slip-fit, ensure the bore tolerance aligns with the shaft tolerance.
- Outer fit and mounting: choose an outer diameter and any flange feature to suit the housing or mounting surface, ensuring clearance and reinforcement where needed.
- Thread standards: select the correct thread form (BSP, BSPT, NPT, metric) and thread size to match mating components; verify seal requirements if used with liquids (pipe fittings, hydraulic lines).
- Material and environment: brass offers good corrosion resistance and conductivity, but consider wash-downs, chemicals, or high-temperature exposure; for aggressive fluids or high heat, evaluate alternative alloys or coatings.
- Tolerances and finish: identify required bore and length tolerances; a smooth bore reduces wear, while a knurled or finished outer surface can aid retention in a housing.
- Standards and compatibility: confirm compatibility with DIN, ISO, or BS standards as applicable to your region and industry.
Where are brass reducer bushes typically used?
- Plumbing fittings and pipe assemblies, especially where a brass reducer connects different pipe sizes
- Hydraulic and pneumatic systems, offering reliable adapters between hoses, tubes, and cylinders
- Automotive and aerospace fixtures requiring compact, reliable shaft adapters or housings
- Industrial machinery, CNC tooling, and robotics where shafts or pins must transition between diameters
- HVAC components, instrumentation enclosures, and control panels needing precise bushings and adapters
- Furniture hardware and woodworking machinery where corrosion resistance and finish are important
How do I install and maintain brass reducer bushes?
- Surface preparation: clean mating surfaces to remove debris, oil, and corrosion; ensure alignment before assembly.
- Plain bore installation: for slip-fit reducers, apply light lubrication if needed and push into place with steady, axial force; avoid hammering to prevent deformation.
- Threaded connections: apply appropriate thread sealing methods (PTFE tape or pipe joint compound) for fluid applications; engage threads evenly to avoid cross-threading; use appropriate torque per standard fastener charts.
- Flanged or shoulder bushings: align with mounting holes or housings before tightening; use proper fasteners to avoid axial play.
- Load and service: verify that the reducer bush handles expected mechanical loads, vibration, and thermal cycling; consider retaining features or set-screws where required.
- Maintenance: inspect for wear, corrosion, or leaks at regular intervals; replace if bore or thread wear reduces performance; store in clean, dry conditions to prevent corrosion buildup.
What related components should I consider with brass reducer bushes?
- Brass bushings and sleeves of matching bore and outer diameter
- Brass adapters, couplings, and connectors (NPT, BSP, or metric)
- Threaded inserts and coupling nuts for secure threaded connections
- Pipe fittings, brass elbows, tees, and reducers in plumbing and HVAC
- Sh shaft collars, bushings, and bearings for mechanical assemblies
- Alternative materials for extreme conditions, such as stainless steel or bronze, if corrosion or wear resistance requires it