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. 302-8168
Mfr. Part No.TXS8
BrandParker
SGD5.60
Each (In a Pack of 10)
units
- - - Steel Zinc Plated - - - - - - 350 bar +120°C -40°C
RS Stock No. 283-3329
Mfr. Part No.59791
BrandElesa
SGD18.82
Each
units
- Hydraulic Blanking Plug - Aluminium Matte Anodised 1/4in G - - - - - +130°C -30°C
RS Stock No. 302-8152
Mfr. Part No.TXS6
BrandParker
SGD4.471
Each (In a Pack of 10)
units
- - - Steel Zinc Plated - - - - - - 350 bar +120°C -40°C
RS Stock No. 704-3114
Mfr. Part No.PM450813E
BrandJohn Guest
SGD18.65
1 Bag of 5
Bag(s)
G 3/8 Male Hydraulic Straight Compression Tube Fitting - Acetal - 3/8in G - - - - 16 bar - -20°C
RS Stock No. 497-987
Mfr. Part No.6H6K4S
BrandParker
SGD8.255
Each (In a Pack of 2)
units
G 3/8 Female Hydraulic Straight Threaded Adaptor G 3/8 Female Steel Yellow Chromated, Zinc Plated 3/8in G Female 3/8in Female G 380 bar +120°C -40°C
RS Stock No. 797-2088
Mfr. Part No.8-12F6MK4S
BrandParker
SGD16.925
Each (In a Pack of 2)
units
G 1/2 Female Hydraulic Straight Threaded Adaptor G 3/4 Male Steel Zinc Plated - G Female - Male G 200 bar - -
RS Stock No. 110-589
Mfr. Part No.SV12LCF
BrandParker
SGD19.04
Each
units
- Hydraulic Bulkhead Compression Tube Fitting - Steel Chromium Free Zinc Plated - - Male - - - 400 bar +120°C -40°C
RS Stock No. 517-2655
Mfr. Part No.1B248-12-12
BrandParker
SGD54.98
Each
units
BSP 3/4 BSP Female Crimped Hose Fitting - Steel Zinc Dichromate Plated 3/4in BSP Female - - - 215 bar - -
RS Stock No. 739-534
Mfr. Part No.PSR25SX
BrandParker
SGD3.617
Each (In a Pack of 10)
units
- Hydraulic Bite Ring - Steel Chromium Free Zinc Plated - - - - - - 420 bar +120°C -40°C
RS Stock No. 807-687
Mfr. Part No.4-4F6MK4S
BrandParker
SGD7.95
Each (In a Pack of 2)
units
G 1/4 Male Hydraulic Straight Threaded Adaptor G 1/4 Female Steel Yellow Chromated, Zinc Plated 1/4in G Male 1/4in Female G 450 bar +120°C -40°C
RS Stock No. 797-2069
Mfr. Part No.6J6MK4S
BrandParker
SGD49.38
Each
units
G 3/8 Female Hydraulic Tee Threaded Adaptor G 3/8 Female Steel Zinc Plated - G Female - Female G 350bar - -
RS Stock No. 367-5938
Mfr. Part No.0915 00 17
BrandLegris
SGD8.473
Each (In a Pack of 3)
units
G 3/8 Female Hydraulic Tee Threaded Adaptor G 3/8 Female Brass Nickel Plated 3/8in G Female 3/8in Female G 20 bar +120°C -20°C
RS Stock No. 704-3118
Mfr. Part No.PM451015FE
BrandJohn Guest
SGD12.58
1 Bag of 2
Bag(s)
- Hydraulic Straight Compression Tube Fitting - Acetal - 5/8in G - - - - 16 bar - -20°C
RS Stock No. 283-1345
Mfr. Part No.FZ1614
BrandEnerpac
SGD29.11
Each
units
NPT 3/8-18 Female Hydraulic Straight Threaded Adaptor NPT 3/8-18 Female - - 3/8-18 NPT Female 3/8-18 Female NPT 700 bar - -
RS Stock No. 797-2016
Mfr. Part No.6R6MK4S
BrandParker
SGD23.62
Each
units
G 3/8 Female Hydraulic Tee Threaded Adaptor G 3/8 Female Steel Zinc Plated - G Female - Female G 350bar - -
RS Stock No. 727-727
Mfr. Part No.VSTI1/8EDCF
BrandParker
SGD4.618
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. 727-733
Mfr. Part No.VSTI1/4EDCF
BrandParker
SGD11.572
Each (In a Pack of 5)
units
- Hydraulic Blanking Plug - Steel Zinc Plated 1/4in G - - - - 400 bar +100°C -30°C
RS Stock No. 797-1971
Mfr. Part No.6EMK4S
BrandParker
SGD23.26
Each
units
G 3/8 Male Hydraulic Elbow Threaded Adaptor G 3/8 Male Steel Zinc Plated - G Male - Male G 350bar - -
RS Stock No. 183-6248
Mfr. Part No.6-6F3MK4S
BrandParker
SGD6.14
Each (In a Pack of 2)
units
G 3/8 Male Hydraulic Straight Threaded Adaptor R 3/8 Male Steel Yellow Chromated, Zinc Plated 3/8in G Male 3/8in Male R 380 bar +120°C -40°C
RS Stock No. 797-2078
Mfr. Part No.6HMK4S
BrandParker
SGD5.195
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 350 bar - -