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. 797-2003
Mfr. Part No.6C6MK4S
BrandParker
SGD22.53
Each
units
G 3/8 Male Hydraulic Elbow Threaded Adaptor G 3/8 Female Steel Zinc Plated - G Male - Female G 350bar - -
RS Stock No. 367-5916
Mfr. Part No.0915 00 10
BrandLegris
SGD3.743
Each (In a Pack of 3)
units
G 1/8 Female Hydraulic Tee Threaded Adaptor G 1/8 Female Brass Nickel Plated 1/8in G Female 1/8in Female G 20 bar +120°C -20°C
RS Stock No. 366-6221
Mfr. Part No.MIK-1
BrandParker
SGD110.30
Each
units
- Hydraulic Thread Identification Kit - - - - BSPP, BSPT, Metric, NPT, SAE - - - - - - -
RS Stock No. 807-485
Mfr. Part No.WH06LRCF
BrandParker
SGD26.03
Each
units
- Hydraulic Banjo Compression Tube Fitting - Mild Steel Zinc Plated 1/8in BSP - - - - 315 bar +120°C -40°C
RS Stock No. 110-517
Mfr. Part No.RI1/4EDX1/2CF
BrandParker
SGD19.895
Each (In a Pack of 2)
units
G 1/4 Male Hydraulic Straight Threaded Reducer G 1/2 Female Steel Zinc Plated 1/4in G Male 1/2in Female G 400 bar +100°C -30°C
RS Stock No. 807-457
Mfr. Part No.RI3/4EDX1/2CF
BrandParker
SGD15.94
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. 286-6874
Mfr. Part No.58299
SGD3.316
Each (In a Pack of 5)
units
- Hydraulic Blanking Plug - Glass Fibre Reinforced Plastic (GRP) Matte 1in G - - - - - +130°C -30°C
RS Stock No. 807-491
Mfr. Part No.WH08LRCF
BrandParker
SGD31.84
Each
units
- Hydraulic Banjo Compression Tube Fitting - Mild Steel Zinc Plated 1/4in BSP - - - - 315 bar +120°C -40°C
RS Stock No. 283-1339
Mfr. Part No.FZ1617
BrandEnerpac
SGD18.61
Each
units
NPT 3/8-18 Male Hydraulic Straight Threaded Adaptor NPT 3/8-18 Male - - 3/8-18 NPT Male 3/8-18 Male NPT 700 bar - -
RS Stock No. 283-3357
Mfr. Part No.59811
SGD16.37
Each
units
- Hydraulic Blanking Plug - Aluminium Matte Anodised 1/2in G - - - - - +130°C -30°C
RS Stock No. 871-2253
Mfr. Part No.VSTI10X1EDCF
BrandParker
SGD5.49
Each
units
- Hydraulic Blanking Plug - Steel Zinc Plated - Metric - - - - 400bar - -
RS Stock No. 410-1551
Mfr. Part No.1D948-8-8
BrandParker
SGD19.98
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. 448-1807
Mfr. Part No.19248-12-12
BrandParker
SGD26.60
Each
units
BSP 3/4 BSP Female Crimped Hose Fitting - Steel Zinc Dichromate Plated 3/4in BSP Female - - - 215 bar - -
RS Stock No. 871-2209
Mfr. Part No.VKAM10LCF
BrandParker
SGD4.64
Each
units
- Hydraulic Blanking Plug - Steel - - - - - - - 500bar - -
RS Stock No. 183-6254
Mfr. Part No.8-8F3MK4S
BrandParker
SGD6.33
Each (In a Pack of 2)
units
G 1/2 Male Hydraulic Straight Threaded Adaptor R 1/2 Male Steel Yellow Chromated, Zinc Plated 1/2in G Male 1/2in Male R 310 bar +120°C -40°C
RS Stock No. 367-5843
Mfr. Part No.0913 00 13
BrandLegris
SGD4.553
Each (In a Pack of 3)
units
R 1/4 Male Hydraulic Elbow Threaded Adaptor G 1/4 Female Brass Nickel Plated 1/4in R Male 1/4in Female G 60 bar +80°C -10°C
RS Stock No. 302-8629
Mfr. Part No.10F3MXS
BrandParker
SGD12.805
Each (In a Pack of 2)
units
- Hydraulic Male Stud - Steel Zinc Plated - R, UNF - - - - 315 bar +120°C -40°C
RS Stock No. 871-2206
Mfr. Part No.VKAM08LCF
BrandParker
SGD4.90
Each
units
- Hydraulic Blanking Plug - Steel - - - - - - - 500bar - -
RS Stock No. 871-2297
Mfr. Part No.8-8F42EDMXS
BrandParker
SGD15.15
Each
units
- Hydraulic Straight Threaded Adaptor BSPP 1/2-14 Male Steel Zinc Chromium 6 - - - - Male BSPP 5000 psi - -
RS Stock No. 367-5922
Mfr. Part No.0915 00 13
BrandLegris
SGD6.627
Each (In a Pack of 3)
units
G 1/4 Female Hydraulic Tee Threaded Adaptor G 1/4 Female Brass Nickel Plated 1/4in G Female 1/4in Female G 20 bar +120°C -20°C