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Tired of not having the right adapter handy? Worry no more with our ORB O-Ring Boss Thread Hydraulic Adapter Kit.
Stocked with the following fittings, you'll be ready to adapt to changing hoses and machinery.
6400-04-04 | 4 |
6400-06-06 | 4 |
6400-08-08 | 4 |
6401-04-04 | 4 |
6401-06-06 | 4 |
6401-08-08 | 4 |
6404-04-04 | 4 |
6404-06-06 | 4 |
6404-08-08 | 4 |
6801-04-04 | 4 |
6801-06-06 | 4 |
6801-08-08 | 4 |
6802-04-04 | 4 |
6802-06-06 | 4 |
6802-08-08 | 4 |
These are stored in a heavy-duty, blue metal case. This case can be used with ULINE's H-6401 Steel Cabinet. Easily store and access your hose fittings when it's time to work.
Questions & Answers

Popular Questions
10 months ago
10 months ago
The numbers on hydraulic fittings refer to the size and type of the fittings. They can indicate the fitting's thread size, pitch, and compatibility with other components. This information was sourced from "Hydraulic Hose Fittings Guide: How to Find the Right One" on the Hydraulics Direct website (https://www.hydraulicsdirect.com/Unde...), specifically under the sections "Understanding the Numbers" and "Choosing the Right Fitting". See full answer »
10 months ago
10 months ago
The three types of hydraulic fittings are JIC (Joint Industry Council) fittings, ORFS (O-Ring Face Seal) fittings, and NPT (National Pipe Tapered) fittings. JIC fittings are most commonly used in the Fluid Power industry, ORFS fittings provide the best leak protection, and NPT fittings are commonly used in low-pressure hydraulic systems. This information was sourced from "Hydraulic Fittings Selection Guide" on Engineering360 (https://www.globalspec.com/learnmore/...) under the sections "Types of Hydraulic Fittings" and "Specifications". See full answer »
10 months ago
10 months ago
To size a hydraulic hose fitting, measure the inside diameter (ID) of the hose to ensure compatibility with the fitting, and verify the fitting's thread type and size using a thread gauge or identification tool. Additionally, consider the hose's pressure rating and application to select a fitting that meets or exceeds the system requirements. See full answer »
9 months ago
9 months ago
This is a good start for your Hose Ends, Can add new ends as you go along.
Will have to decide what type of hose needed R2, 2 wire or R1-1 wires hose etc. See full answer »
Will have to decide what type of hose needed R2, 2 wire or R1-1 wires hose etc. See full answer »
10 months ago
10 months ago
To determine the correct size hydraulic fitting, measure the outer diameter (OD) of the fitting's threads and the pitch (distance between threads) using calipers and a thread pitch gauge. Consult a sizing chart or the manufacturer's specifications to match these measurements to the appropriate fitting size. See full answer »
9 months ago
9 months ago
Hydraulic fittings are components used to connect hoses, pipes, and tubes in a hydraulic system, ensuring a secure and leak-free flow of hydraulic fluid. They come in various types, such as threaded, crimped, and flanged, and are made from materials like steel, brass, or stainless steel to withstand high pressures and corrosive environments. Proper selection and installation of hydraulic fittings are crucial for maintaining system integrity and performance. See full answer »
9 months ago
9 months ago
To identify types of hydraulic fittings, you can look at the thread type (such as NPT, BSP, or metric), the sealing method (like O-ring, metal-to-metal, or tapered), and the fitting shape (such as elbow, tee, or straight). Additionally, checking the manufacturer's specifications and using a thread gauge can help ensure accurate identification. See full answer »
8 months ago
8 months ago
To choose hydraulic hose fittings, consider the hose size, pressure rating, and compatibility with the fluid being used. Additionally, ensure the fitting type matches the hose and equipment connections, and select materials that can withstand the operating environment and conditions. See full answer »
8 months ago
8 months ago
To identify hydraulic fittings, examine the thread type, size, and sealing method, such as O-ring, metal-to-metal, or tapered threads. Additionally, use identification tools like thread gauges and calipers, and consult fitting charts or manufacturer specifications for accurate matching. See full answer »
8 months ago
8 months ago
Hydraulic fittings are components used to connect hoses, pipes, and tubes in a hydraulic system, ensuring a secure and leak-free connection. They work by using various sealing mechanisms, such as O-rings or metal-to-metal contact, to withstand high pressure and facilitate the flow of hydraulic fluid. Proper selection and installation of these fittings are crucial for maintaining system integrity and performance. See full answer »
