RS PRO Threaded Fitting, Straight Reducer Bush Reducer Bush Reducer Bush, Male BSPT 25.4 mm to Female BSPP 12.7 mm
RS Stock No. 297-2216
Brand RS Pro
- Connection 2: 1/2 in BSPP Female
- Fitting Direction: Straight
- Fitting Type: Reducer Bush
AED 122.07
in stock now
RS PRO Threaded Fitting, Straight Reducer Bush Reducer Bush Reducer Bush, Male BSPT 25.4 mm to Female BSPP 19.05 mm
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 123.36
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 35.28
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 21.18
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 44.15
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 34.72
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 60.67
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 60.67
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 60.67
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 60.67
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 60.67
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 60.67
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 60.67
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 60.67
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 60.67
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