Shop Adapter, Seal & Thread Gauge Kits
Our OneHydraulics Adapter, Thread Gauge, and O-Ring Seal Kits are essential tools for identifying, connecting, and maintaining a wide range of hydraulic fittings. Adapter kits include popular connection types such as DIN, BSPP, Metric, JIC, NPT, and Komatsu, providing versatile solutions for virtually any hydraulic system. Thread Gauge ID Kits—available in JIC, NPT, ORB, ORFS, BSP, and Metric—ensure quick and accurate thread identification to prevent mismatched fittings. Now featuring our premium O-Ring Seal Kits, including Male ORB, ORFS, BSPP & Metric Bonded Seals, and SAE Code 61 & Code 62 Flange Seals, this comprehensive collection delivers everything you need to ensure reliable, leak-free connections. Compact, organized, and portable, these kits are perfect for keeping in your shop, service truck, or retail space for fast, efficient hydraulic maintenance and repairs.
These kits cover identifying, capping and sealing hydraulic connections. Thread ID gauge kits measure JIC, NPT, ORB, ORFS, BSP and metric threads. Plug and cap kits close open lines and ports during service in JIC, ORFS, NPT, BSPP, DIN light, DIN heavy and Komatsu styles. Seal kits cover male ORB and ORFS O-rings, BSPP and metric bonded seals, and Code 61 and 62 flange O-rings. Match the kit to your threads; the adapter guide shows how to identify them.
Frequently Asked Questions
How do I use a thread ID gauge kit?
First confirm whether the thread is parallel or tapered. Use the pitch gauges to find threads per inch, or pitch in millimeters for metric, then measure the outside diameter of a male thread or inside diameter of a female thread with calipers. Match the readings to a thread chart, and use the sealing surface, such as a flare angle, O-ring or cone, to pin down the exact family. Kits are offered for JIC, NPT, ORB and ORFS; for BSP and metric; for NPT and UN; and for BSPP and metric.
What are hydraulic plug and cap kits for?
They seal hoses, tubes, ports and fittings whenever a line is disconnected, keeping dirt out of the system and fluid in. Plugs close female ports and fittings, and caps close male ends. Kits are organized by thread style: JIC, ORFS, NPT, BSPP, DIN light series, DIN heavy series and Komatsu, so choose the kit that matches the connections on your equipment.
Which O-ring kit do I need for ORB fittings?
Use the male ORB O-ring kit. ORB (SAE O-ring boss) fittings seal with an O-ring on the male thread that compresses into a chamfer in the port, and the kit's O-rings are Buna-N (nitrile) in 90 durometer. ORFS fittings use a different O-ring that sits in the male face, so they have their own seal kit.
What are bonded seals used for?
Bonded seals are metal washers with a bonded rubber sealing ring. They seal parallel-thread port connections such as BSPP and metric, where the thread itself doesn't seal. The bonded seal kit covers BSPP and metric sizes.
Is there an O-ring kit for SAE flanges?
Yes. SAE Code 61 and Code 62 4-bolt flanges seal with an O-ring compressed between the flange head and the flat port face, and the SAE flange O-ring kit covers both Code 61 and Code 62 sizes.
What are banjo kits?
Banjo kits group banjo fittings for metric threads, for BSPP threads, and a combined BSPP and metric set. A banjo fitting has a hollow bolt that passes through a ring-shaped eye, letting a line connect to a port in a compact space, and it seals with a washer on each side of the eye.