Since 1936, we have offered high quality industrial grade steel hydraulic fittings. Whether you require SAE standard hydraulic fittings or unique configurations based on detailed specifications, we maintain a large industrial selection of hydraulic fittings applicable to your needs. We work with the following fitting components:

  • SAE Boss Hydraulic Adapters
  • JIC 37 Degree Fittings
  • Pipe Fittings
  • Metric Hydraulic Fittings
  • Metric to American Conversion Fittings
  • British Parallel Hydraulic Fittings
  • British Taper Hydraulic Fittings
  • Hydraulic Adapters
  • ISO Hydraulic Fittings
  • Special Hydraulic Adapters
  • Metric 24 Degree Flareless Hydraulic Adapters
  • Brass & Steel Fittings

Equipment, cables and piping as found inside of industrial power plant

Cross Reference by Part Series

Manufacturing Capabilities

Our catalog contains a full range of fitting components. On top of that, we offer custom made-to-fit components. We can create highly specialized hydraulic systems that have standard and custom components simply by receiving a sketch and your design specifications.

We begin with designing each component with the help of CAD, CAM and FEA software. The designs are transformed into physical components by our machinists. Then all metal burrs are eliminated before being passed through our washing system to eliminate metal contaminants. We also maintain a micro particle clean lab for specified components that must meet extraordinary cleanliness standards.

We ensure that our design and manufacturing processes are of the highest quality by maintaining proper certification and in-house inspections. We are an ISO 9001:2015 Certified manufacturer and use a range of quality processes. They include:

  • Using gage certification to make sure the dimensions of each fitting component is 100% accurate based on specified measurements.


  • Individually trained employees capable of operating statistical process control software to monitor and control the manufacturing process.


  • Real Time Quality Data Acquisition managed by each individual machine operator provides us with an additional element of quality assurance.


Our in-house ISO 9001:2015 certified quality assurance process has been recognized by the following companies: Ford, International Truck and Engine, J.I. Case Co., Gates Rubber Company, and Bendix Allied Signal.

L & L Fittings is CMR compliant and RoHS compliant.

Our manufacturing portfolio contains considerable experience in the following types of specialty fittings and parts:

  • Metric Conversion Adapters such as metric straight threads and British tapered and parallel pipe threads.


  • Specialty machined parts including screw machine parts, precision milling as well as finish machining for near net shape iron castings and steel cold-headed parts.

All L & L Fittings orders are packaged in-house by our employees in strong cartons wrapped in protective caps with clearly labeled packages. We use standard national and international carriers and generally have stock orders shipped within the same day. Customers may also inquire about our Just-In-Time manufacturing process or expedited manufacture and shipping for products needed within 24 hours.

Not sure what you need? Our customer service staff will help you find the exact inventory components you need or suggest custom spec components. Our website will also help guide you through the various metal types of hydraulic fittings and their uses based on specific industries such as agricultural, automotive, commercial more. Provide us with a sketch of your required hydraulic fitting components along with the desired quantity and we will be able to give you a quote within 24 hours.

L & L Fittings Mfg. specializes in the design and manufacturing of pipe and tube fittings for the following industries.