• 1" BSPT Tapered x 1" BSPT Tapered Adaptor
    Regular price £8.41
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    • Delivery to UK & Ireland

    1" BSPT Tapered x 1" BSPT Tapered Adaptor

    Key Features

    • Type: adaptor converting parallel to tapered port standards
    • Threads: 1 to 1 thread
    • Standards: BSPP parallel and BSPT taper as applicable
    • Sealing: taper threads with sealant; parallel with washer/bonded seal
    • Use: connect BSPP components to BSPT ports or vice versa
    Regular price £8.41
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Male x 3/8" BSP Fixed Female Extended Adaptor - Approved Hydraulics Limited
    Regular price £2.46
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    • Delivery to UK & Ireland

    1/4" BSP Male to 3/8" BSP Female Fixed & Extended

    Key Features

    • Type: hydraulic fitting
    • Threads: 1/4 to 3/8 thread
    • Material: plated carbon steel
    • Use: connect hydraulic components
    • Standard: BSP and related port forms as specified
    Regular price £2.46
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £6.46
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    • Delivery to UK & Ireland

    1/4 BSP Male x 3/8 BSP Male Adaptor

    Key Features

    • Type: straight thread adaptor
    • Threads: 1/4 to 3/8 thread
    • Standard: BSPP parallel unless specified otherwise
    • Material: plated carbon steel
    • Use: join hoses; valves; or adapt port sizes
    Regular price £6.46
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £7.24
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    • Delivery to UK & Ireland

    1/4 BSP x M18 x 1.5 MM ISO6149 Adaptor

    Key Features

    • Type: straight thread adaptor
    • Threads: 1/4 to 1.5 thread
    • Standard: BSPP parallel unless specified otherwise
    • Material: plated carbon steel
    • Use: join hoses; valves; or adapt port sizes
    Regular price £7.24
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • Team Member

    Adam Hindle

    Sales Director

    I began my engineering career at Stockport College in around 2005, first completing a National Diploma in Electrical Engineering, followed by a Higher National Diploma in Mechanical Engineering. I then progressed to the University of Salford, where I earned a BEng (Hons) degree in Mechanical Engineering.

    After graduating, I started my professional career with Approved Hydraulics. I initially gained a combination of hands-on workshop experience and telephone-based sales experience. In later years, I moved into a full-time sales role and led the new crane and excavator attachments department that the company had recently established.

  • 3/4" BSPT Male Tapered x 3/4" BSPT Male Tapered Adaptor
    Regular price £5.63
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/4" BSPT Male Tapered x 3/4" BSPT Male Tapered Adaptor

    Key Features

    • Type: adaptor converting parallel to tapered port standards
    • Threads: 3/4 to 3/4 thread
    • Standards: BSPP parallel and BSPT taper as applicable
    • Sealing: taper threads with sealant; parallel with washer/bonded seal
    • Use: connect BSPP components to BSPT ports or vice versa
    Regular price £5.63
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2 BSP Male - 9/16 UNF Male SORB without "O" Ring - Approved Hydraulics Limited
    Regular price £2.60
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/2 BSP Male - 9/16 UNF Male SORB without "O" Ring

    Key Features

    • Type: adaptor between SAE O-ring boss/UNF and BSP system
    • Threads: 1/2 to 9/16 thread
    • Seal: O-ring boss on SAE side; bonded washer or cone on BSP side
    • Note: some variants supplied without O-ring as stated
    • Use: interface US standard ports to BSP hoses/valves
    Regular price £2.60
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1" BSP Male x 1" BSPT Male Tapered Adaptor
    Regular price £5.48
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1" BSP Male x 1" BSPT Male Tapered Adaptor

    Key Features

    • Type: adaptor converting parallel to tapered port standards
    • Threads: 1 to 1 thread
    • Standards: BSPP parallel and BSPT taper as applicable
    • Sealing: taper threads with sealant; parallel with washer/bonded seal
    • Use: connect BSPP components to BSPT ports or vice versa
    Regular price £5.48
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/4" BSP x 3/4" BSP Bulkhead Adaptor with Locknut - Approved Hydraulics Limited
    Regular price £3.71
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/4 BSP Bulk Head Adaptors (Supplied without nut)

    Key Features

    • Type: straight thread adaptor
    • Threads: 1/4 thread
    • Standard: BSPP parallel unless specified otherwise
    • Material: plated carbon steel
    • Use: join hoses; valves; or adapt port sizes
    Regular price £3.71
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Male x 1/2" BSP Female Swivel Adaptor - Approved Hydraulics Limited
    Regular price £5.58
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    • Delivery to UK & Ireland

    3/8 BSP Male x 3/8 BSP Female Swivel Adaptor

    Key Features

    • Type: swivel adaptor
    • Threads: 3/8 to 3/8 thread
    • Swivel: captive nut allows orientation during tightening
    • Seal: flat face or cone seat per variant
    • Use: connect hoses where rotation is restricted
    Regular price £5.58
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2 BSPT x 1/2 BSPT Tapered Adaptor
    Regular price £3.61
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/2 BSPT x 1/2 BSPT Tapered Adaptor

    Key Features

    • Type: adaptor converting parallel to tapered port standards
    • Threads: 1/2 to 1/2 thread
    • Standards: BSPP parallel and BSPT taper as applicable
    • Sealing: taper threads with sealant; parallel with washer/bonded seal
    • Use: connect BSPP components to BSPT ports or vice versa
    Regular price £3.61
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1" BSP Female Blanking Cap
    Regular price £11.29
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    • Delivery to UK & Ireland

    1" BSP Female Blanking Cap

    Key Features

    • Type: port blanking component
    • Thread: 1 BSP
    • Seal: washer or O-ring depending on seat style
    • Material: plated carbon steel
    • Use: temporary or permanent closure of ports
    Regular price £11.29
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Male x 1/2" BSP Female Swivel Adaptor - Approved Hydraulics Limited
    Regular price £5.39
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/4 BSP Male x 3/8 BSP Swivel Female

    Key Features

    • Type: hydraulic fitting
    • Threads: 1/4 to 3/8 thread
    • Material: plated carbon steel
    • Use: connect hydraulic components
    • Standard: BSP and related port forms as specified
    Regular price £5.39
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Male x 3/8" BSP Fixed Female Extended Adaptor - Approved Hydraulics Limited
    Regular price £2.99
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/2" BSP Male x 3/8" BSP Fixed Female Extended Adaptor

    Key Features

    • Type: straight thread adaptor
    • Threads: 1/2 to 3/8 thread
    • Standard: BSPP parallel unless specified otherwise
    • Material: plated carbon steel
    • Use: join hoses; valves; or adapt port sizes
    Regular price £2.99
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSPT Tapered x 3/8" BSPT Tapered
    Regular price £3.23
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8" BSPT Tapered x 3/8" BSPT Tapered

    Key Features

    • Type: hydraulic fitting
    • Threads: 3/8 to 3/8 thread
    • Material: plated carbon steel
    • Use: connect hydraulic components
    • Standard: BSP and related port forms as specified
    Regular price £3.23
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £11.20
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1" BSP Male x 1" BSP Male Adaptor

    Key Features

    • Type: straight thread adaptor
    • Threads: 1 to 1 thread
    • Standard: BSPP parallel unless specified otherwise
    • Material: plated carbon steel
    • Use: join hoses; valves; or adapt port sizes
    Regular price £11.20
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £2.80
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/4 BSP x 1/4 BSP M/M Ad

    Key Features

    • Type: hydraulic fitting
    • Threads: 1/4 to 1/4 thread
    • Material: plated carbon steel
    • Use: connect hydraulic components
    • Standard: BSP and related port forms as specified
    Regular price £2.80
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1/2" BSP Male x 1 1/4" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £4.24
    • All Items Guaranteed
    • Delivery to UK & Ireland

    3/8BSPM - 3/4BSPM Ad

    Key Features

    • Type: hydraulic fitting
    • Threads: 3/8 to 3/4 thread
    • Material: plated carbon steel
    • Use: connect hydraulic components
    • Standard: BSP and related port forms as specified
    Regular price £4.24
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 3/8" BSP Male x 1/2" BSP Male Adaptor - Approved Hydraulics Limited
    Regular price £3.13
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1/2 BSPm x 1/2 BSPm

    Key Features

    • Type: hydraulic fitting
    • Threads: 1/2 to 1/2 thread
    • Material: plated carbon steel
    • Use: connect hydraulic components
    • Standard: BSP and related port forms as specified
    Regular price £3.13
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery
  • 1" Male Female Tipper Quick Release  Coupling (Set) - Approved Hydraulics Limited
    Regular price £123.05
    • All Items Guaranteed
    • Delivery to UK & Ireland

    1" Male Female Tipper Quick Release Coupling (Set)

    Key Features

    • Size: 1"
    • Type: screw type quick release set
    • Ends: male ; female pair
    • Use: tipper circuit disconnect
    • Application: single acting tipping gear
    Regular price £123.05
    • All Items Guaranteed
    • Delivery to UK & Ireland
    • Order by 3pm for Next Day Delivery

Hydraulic Fittings & Adaptors for Professional Hydraulic Applications

Discover quality hydraulic fittings & adaptors from Approved Hydraulics, trusted by professionals across construction, transport, forestry, agriculture and industrial sectors. Our range includes reliable components and equipment designed for dependable performance, long service life and straightforward installation. Browse related products including hose fittings adaptors, quick release couplings, nuts bolts and washers to find the right solution for your hydraulic system. With fast UK delivery and expert technical support, Approved Hydraulics supplies hydraulic equipment you can rely on.

Common Calculations FAQs

Calculating force, speed, pressure, power, and efficiency in hydraulic applications.

How do you calculate actuator speed?

Actuator speed is determined by flow rate and cross-sectional area:

Speed = Flow rate ÷ Area

Flow rate is the volume of fluid delivered (in L/min or GPM).

Area is the cross-sectional area of the actuator piston: π × (diameter ÷ 2)².

How do you calculate cylinder force?

Cylinder force can be calculated using:

Force = Pressure × Area

Pressure is the system pressure (in psi or bar).

Area is the cross-sectional area of the cylinder bore (in square inches or square centimeters).

Area = π × (bore diameter ÷ 2)².

How do you calculate pressure drop across a valve?

Pressure drop can be calculated using the valve flow coefficient (Cv):

Pressure Drop (ΔP) = (Flow Rate)² ÷ (Cv² × Fluid Density)

Flow Rate is the fluid flow (in GPM or L/min).

Cv is the valve flow coefficient.

Fluid Density is the density of the hydraulic fluid.

How do you size an accumulator?

Accumulator sizing considers required flow, pressure, and pre-charge:

Accumulator Volume = Flow Rate × Time ÷ Pressure

This determines how much fluid must be stored to maintain system pressure.

How to convert psi to bar?

Use the conversion factor: 1 bar = 14.5 psi.

To convert psi to bar, divide psi by 14.5.

Example: 200 psi ÷ 14.5 = 13.79 bar.

What is pre-charge pressure in an accumulator?

Pre-charge pressure is the initial gas pressure in the accumulator before fluid enters.

It helps maintain system pressure as the accumulator discharges.

Typically set to 70–80% of system operating pressure.

What is specific gravity of hydraulic fluid?

Specific gravity is the ratio of hydraulic fluid density to water.

A value of 1 means equal density.

Less than 1 means the fluid floats; greater than 1 means it sinks.

What is torque in a hydraulic motor?

Torque is the rotational force produced based on system pressure and motor displacement:

Torque = Pressure × Displacement ÷ 2π

Pressure is the operating system pressure.

Displacement is the volume displaced per revolution (in cubic inches or cubic centimeters).

What unit is hydraulic power measured in?

Hydraulic power is measured in horsepower (HP) or kilowatts (kW).

Hydraulic horsepower can be calculated using:

HP = (Pressure (psi) × Flow rate (GPM)) ÷ 1714.

What’s the relationship between pump speed and flow?

Flow rate is directly proportional to pump speed.

If pump speed doubles, flow rate doubles (assuming constant displacement).

This is important when adjusting flow or selecting a pump for varying speeds.