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. 727-777
Mfr. Part No.VSTI1EDCF
BrandParker
SGD19.595
Each (In a Pack of 2)
units
- Hydraulic Blanking Plug - Steel Zinc Plated 1in G - - - - 400 bar +100°C -30°C
RS Stock No. 498-182
Mfr. Part No.12H6K4S
BrandParker
SGD22.495
Each (In a Pack of 2)
units
G 3/4 Female Hydraulic Straight Threaded Adaptor G 3/4 Female Steel Yellow Chromated, Zinc Plated 3/4in G Female 3/4in Female G 280 bar +120°C -40°C
RS Stock No. 914-9482
Mfr. Part No.58411
BrandElesa
SGD5.77
Each
units
- Hydraulic Blanking Plug - Polyamide Based Technopolymer Matte 1-1/4in G - - - - - +100°C -30°C
RS Stock No. 797-2094
Mfr. Part No.16-16F6MK4S
BrandParker
SGD27.985
Each (In a Pack of 2)
units
G 1 Female Hydraulic Straight Threaded Adaptor G 1 Male Steel Zinc Plated - G Female - Male G 120 bar - -
RS Stock No. 797-1962
Mfr. Part No.4EMK4S
BrandParker
SGD16.68
Each
units
G 1/4 Male Hydraulic Elbow Threaded Adaptor G 1/4 Male Steel Zinc Plated - G Male - Male G 350bar - -
RS Stock No. 871-2228
Mfr. Part No.VKAM08SCF
BrandParker
SGD4.66
Each
units
- Hydraulic Blanking Plug - Steel - - - - - - - 800bar - -
RS Stock No. 302-8584
Mfr. Part No.5-4F3MXS
BrandParker
SGD9.675
Each (In a Pack of 2)
units
- - - Steel Zinc Plated - - - - - - 315 bar +120°C -40°C
RS Stock No. 807-514
Mfr. Part No.WH12LRCF
BrandParker
SGD43.85
Each
units
G 3/8 Hydraulic Banjo Compression Tube Fitting - Mild Steel Zinc Plated 3/8in G - - - - 315 bar +120°C -40°C
RS Stock No. 871-2247
Mfr. Part No.GE10LMEDCF
BrandParker
SGD7.68
Each
units
- Hydraulic Straight Threaded Adaptor M14 x 1.5 Male Steel Zinc Chromium 6 - - - - Male Metric 500bar - -
RS Stock No. 326-8940
Mfr. Part No.3118 04 10
BrandLegris
SGD5.376
Each (In a Pack of 5)
units
G 1/8 Hydraulic Banjo Compression Tube Fitting - Nickel Plated Brass, Nitrile Rubber, Polymer, Stainless Steel Nickel Plated (Sub Base) 1/8in G - - - - 20 bar +80°C -20°C
RS Stock No. 110-595
Mfr. Part No.SV15LCF
BrandParker
SGD28.88
Each
units
- Hydraulic Bulkhead Compression Tube Fitting - Steel Chromium Free Zinc Plated - - Male - - - 400 bar +120°C -40°C
RS Stock No. 367-5944
Mfr. Part No.0915 00 21
BrandLegris
SGD13.573
Each (In a Pack of 3)
units
G 1/2 Female Hydraulic Tee Threaded Adaptor G 1/2 Female Brass Nickel Plated 1/2in G Female 1/2in Female G 60 bar +120°C -20°C
RS Stock No. 183-6260
Mfr. Part No.8F3MK4S
BrandParker
SGD6.635
Each (In a Pack of 2)
units
G 1/2 Male Hydraulic Straight Threaded Adaptor R 3/8 Male Steel Yellow Chromated, Zinc Plated 1/2in G Male 3/8in Male R 310 bar +120°C -40°C
RS Stock No. 797-1980
Mfr. Part No.4JMK4S
BrandParker
SGD17.54
Each
units
G 1/4 Male Hydraulic Tee Threaded Adaptor G 1/4 Male Steel Zinc Plated - G Male - Male G 350bar - -
RS Stock No. 797-2025
Mfr. Part No.8R6MK4S
BrandParker
SGD45.04
Each
units
G 1/2 Female Hydraulic Tee Threaded Adaptor G 1/2 Female Steel Zinc Plated - G Female - Female G 199bar - -
RS Stock No. 797-1952
Mfr. Part No.6WMK4WL4NMS
BrandParker
SGD17.28
Each (In a Pack of 2)
units
G 3/8 Male Hydraulic Straight Threaded Adaptor G 3/8 Male Steel Zinc Plated - G Male - Male G - - -
RS Stock No. 871-2243
Mfr. Part No.GE08LMEDCF
BrandParker
SGD6.82
Each
units
- Hydraulic Straight Threaded Adaptor M12 x 1.5 Male Steel Zinc Chromium 6 - - - - Male Metric 500bar - -
RS Stock No. 497-971
Mfr. Part No.4H6K4S
BrandParker
SGD7.67
Each (In a Pack of 2)
units
G 1/4 Female Hydraulic Straight Threaded Adaptor G 1/4 Female Steel Yellow Chromated, Zinc Plated 1/4in G Female 1/4in Female G 450 bar +120°C -40°C
RS Stock No. 797-2050
Mfr. Part No.4J6MK4S
BrandParker
SGD54.86
Each
units
G 1/4 Female Hydraulic Tee Threaded Adaptor G 1/4 Female Steel Zinc Plated - G Female - Female G 350bar - -
RS Stock No. 739-512
Mfr. Part No.PSR16SX
BrandParker
SGD14.657
Each (In a Pack of 10)
units
- Hydraulic Bite Ring - Steel Chromium Free Zinc Plated - - - - - - 630 bar +120°C -40°C