Hydraulic Fittings

Hydraulic fittings form part of a hydraulic system which connects hoses, pipes and tubes. There are various fittings which are used to connect the system together and help the hydraulic fluid to flow through. Hydraulic fittings, or hose fittings, are used to connect hydraulic hoses and pipes to other components such as valves and pumps.

Hydraulic fittings will usually have a male and/or female connection which join to other components. The connections are usually threaded and there are several thread standards available, such as JIC, BSP and BSPP. BSP male threads will seal with BSP female threads, for example. Popular materials include plastic, brass and stainless steel fittings.

Types of hydraulic fittings:

  • Plugs
  • Adapters
  • Couplings
  • Unions
  • Reducers
  • Elbows

How are hydraulic fittings attached?

There are several methods used to attach a hydraulic fitting. Examples include:

  • Compression fittings provide water tight connections by using pressure to seal the connection. They usually use a compression nut which, when tightened, removes space between the ferrule and the pipe.
  • Threaded fittings have screw threads on both sides of the connection. They accept connections with compatible threads and screw together for a secure connection. Not all threads provide a tight seal and may benefit from additional coatings or seals.
  • Crimped fittings require crimping of the hose to the fitting. You may require a crimping tool to achieve this.

Thread Types

Hydraulics machines are used all across the world and there are many components used in each system. Thread types are used to help make parts easily identifiable and easy to maintain and replace. Some examples of thread standards include:

  • NPT stands for National Pipe Thread where the threads are at a 60° angle. There is also NPT (National Pipe Taper) and NPS (National Pipe Straight).
  • BSP fittings stands for British Standard Pipe where the angle of the threads is 55°. This standard includes BSPT (British Standard Pipe Taper) and BSPP (British Standard Parallel Pipe).
  • Metric threads are specified by their diameter and pitch in millimetres (mm).

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Description Price Connector A Hydraulic Fitting Type Connector B Material Finish Connector A - Thread Size Connector A - Thread Standard Connector A - Gender Connector B - Thread Size Connector B - Gender Connector B - Thread Standard Maximum Operating Pressure Maximum Operating Temperature Minimum Operating Temperature
RS Stock No. 366-6221
Mfr. Part No.MIK-1
BrandParker
TWD2,466.00
Each
units
- Hydraulic Thread Identification Kit - - - - BSPP, BSPT, Metric, NPT, SAE - - - - - - -
RS Stock No. 410-1551
Mfr. Part No.1D948-8-8
BrandParker
TWD430.00
Each
units
BSP 1/2 BSP Male Crimped Hose Fitting - Steel Zinc Dichromate Plated 1/2in BSP Male - - - 275 bar +105°C -30°C
RS Stock No. 704-3102
Mfr. Part No.PM450612E
BrandJohn Guest
TWD379.00
1 Bag of 5
Bag(s)
G 1/4 Male Hydraulic Straight Compression Tube Fitting - Acetal - 1/4in G - - - - 16 bar - -20°C
RS Stock No. 807-592
Mfr. Part No.8-6HMK4S
BrandParker
TWD119.50
Each (In a Pack of 2)
units
G 3/8 Male Hydraulic Straight Threaded Adaptor G 1/2 Male Steel Yellow Chromated, Zinc Plated 3/8in G Male 1/2in Male G 380 bar +120°C -40°C
RS Stock No. 807-564
Mfr. Part No.4HMK4S
BrandParker
TWD81.00
Each (In a Pack of 2)
units
G 1/4 Male Hydraulic Straight Threaded Adaptor G 1/4 Male Steel Yellow Chromated, Zinc Plated 1/4in G Male 1/4in Male G 450 bar +120°C -40°C
RS Stock No. 871-2284
Mfr. Part No.4F42EDMXS
BrandParker
TWD259.00
Each
units
- Hydraulic Straight Threaded Adaptor BSPP 1/8-28 Male Steel Zinc Chromium 6 - - - - Male BSPP 7200 psi - -
RS Stock No. 807-570
Mfr. Part No.6-4HMK4S
BrandParker
TWD104.50
Each (In a Pack of 2)
units
G 1/4 Male Hydraulic Straight Threaded Adaptor G 3/8 Male Steel Yellow Chromated, Zinc Plated 1/4in G Male 3/8in Male G 450 bar +120°C -40°C
RS Stock No. 797-2047
Mfr. Part No.4E6MK4S
BrandParker
TWD566.00
Each
units
G 1/4 Female Hydraulic Elbow Threaded Adaptor G 1/4 Female Steel Zinc Plated - G Female - Female G 350bar - -
RS Stock No. 871-2287
Mfr. Part No.4-4F42EDMXS
BrandParker
TWD230.00
Each
units
- Hydraulic Straight Threaded Adaptor BSPP 1/4-19 Male Steel Zinc Chromium 6 - - - - Male BSPP 6000 psi - -
RS Stock No. 914-9505
Mfr. Part No.59729
TWD449.00
Each
units
- Hydraulic Blanking Plug - Aluminium Black Anodised 1in G - - - - - +100°C -30°C
RS Stock No. 498-340
Mfr. Part No.16PNK4S
BrandParker
TWD277.00
Each (In a Pack of 5)
units
- Hydraulic Blanking Plug - Steel Yellow Chromated, Zinc Plated 1in G - - - - 240 bar +120°C -40°C
RS Stock No. 183-6327
Mfr. Part No.12FNMK4S
BrandParker
TWD268.00
Each (In a Pack of 2)
units
G 3/4 Hydraulic Blanking Plug - Steel - 3/4in G - - - - 240 bar - -
RS Stock No. 498-198
Mfr. Part No.16H6K4S
BrandParker
TWD546.50
Each (In a Pack of 2)
units
G 1 Female Hydraulic Straight Threaded Adaptor G 1 Female Steel Yellow Chromated, Zinc Plated 1in G Female 1in Female G 240 bar +120°C -40°C
RS Stock No. 797-1974
Mfr. Part No.8ENMK4S
BrandParker
TWD711.00
Each
units
G 1/2 Male Hydraulic Elbow Threaded Adaptor G 1/2 Male Steel Zinc Plated - G Male - Male G 350bar - -
RS Stock No. 727-727
Mfr. Part No.VSTI1/8EDCF
BrandParker
TWD93.40
Each (In a Pack of 5)
units
- Hydraulic Blanking Plug - Steel Zinc Plated 1/8in G - - - - 400 bar +100°C -30°C
RS Stock No. 797-1956
Mfr. Part No.8WMK4WL4NMS
BrandParker
TWD386.00
Each (In a Pack of 2)
units
G 1/2 Male Hydraulic Straight Threaded Adaptor G 1/2 Male Steel Zinc Plated - G Male - Male G - - -
RS Stock No. 299-0157
Mfr. Part No.19248-8-8
BrandParker
TWD363.00
Each
units
BSP 1/2 BSP Female Crimped Hose Fitting - Steel Zinc Dichromate Plated 1/2in BSP Female - - - 275 bar +100°C -40°C
RS Stock No. 914-9508
Mfr. Part No.59725
TWD327.00
Each
units
- Hydraulic Blanking Plug - Aluminium Black Anodised 1/2in G - - - - - +100°C -30°C
RS Stock No. 807-457
Mfr. Part No.RI3/4EDX1/2CF
BrandParker
TWD289.00
Each (In a Pack of 2)
units
G 3/4 Male Hydraulic Straight Threaded Reducer G 1/2 Female Steel Zinc Plated 3/4in G Male 1/2in Female G 315 bar +100°C -30°C
RS Stock No. 283-3329
Mfr. Part No.59791
TWD400.00
Each
units
- Hydraulic Blanking Plug - Aluminium Matte Anodised 1/4in G - - - - - +130°C -30°C