Hydraulic Adaptors Supplied Nationwide by Hydraquip
When hydraulic systems fail, pressure doesn’t just drop in the hose, it builds on site. Getting the correct adaptor fitted quickly is essential to restoring function and preventing extended downtime. BSP, JIC, and metric threads each follow different standards, and selecting the right one isn’t optional, it’s critical.
At Hydraquip Hose & Hydraulics, we provide 24/7 mobile support across the UK. Our engineers carry a full range of hydraulic hoses and adaptors, including BSPP, BSPT, and metric options. Every fitting is identified and selected with precision, using calibrated tools and hands-on knowledge built through years of fieldwork.
Understanding Thread Standards and Why They Matter
Hydraulic thread standards define how components connect, seal, and perform under pressure. BSP, JIC, and metric threads all differ in form and function and using the wrong one introduces more than just a poor fit. It compromises the entire system.
When the wrong thread is used, sealing faces don’t align properly. Leaks, thread damage, and fitting failure follow. That’s why thread recognition is the first step in every Hydraquip call-out.
BSP Adaptors: Parallel vs Tapered Threads and Industry Use
BSP adaptors are a mainstay in UK hydraulic systems, found across construction, utilities, recycling, and plant equipment. They’re available in two thread forms: BSPP (parallel) and BSPT (tapered). While the threads appear similar at a glance, their sealing methods and applications are entirely different.
BSPP relies on a flat seal, usually with a bonded washer or O-ring face. It’s the most common type found in hydraulic valve blocks, cylinders, and return lines. BSPT, on the other hand, uses a tapered thread that forms a seal through metal-to-metal interference, often with thread sealant. This version is more typical in legacy systems and general fluid connections.
Our engineers identify and match BSP threads using calibrated tools to avoid thread damage or incorrect torque. Because both types are common in UK-built machines, we stock a full range of BSP adaptors on every Hydraquip service vehicle. That ensures we can replace the correct fitting during the first visit, even if the failed part isn’t labelled.
JIC Adaptors: High-Pressure Applications and Sector Fit
JIC adaptors are built for pressure. Their 37° flare design forms a metal-to-metal seal, removing the need for bonded washers or thread sealant. This makes them ideal for systems where pressure surges, movement, and vibration are common.
These fittings are widely used across sectors like transport, marine, and heavy equipment. On lift systems, vehicle-mounted hydraulics, and mobile plant machinery, JIC adaptors offer secure, reusable connections that maintain integrity under load. Their sealing faces must remain undamaged and properly aligned, over-torquing or cross-threading can compromise the seal, even if the threads still engage.
Metric Adaptors: DIN, JIS and Matching OEM Systems
Metric hydraulic adaptors cover a wide range of thread forms and sealing methods, often varying by region and manufacturer. In the UK, they’re most commonly seen on imported machinery from European and Japanese OEMs. Accurate identification is critical as these threads often appear similar to BSP or JIC but do not seal the same way.
DIN 2353 adaptors use a bite-type design where a cutting ring grips the tube to form a mechanical seal. These are common on German-built equipment and are often used in static or high-pressure systems with rigid tubing. Correct torque and installation are essential to prevent under- or over-compression of the bite ring.
JIS and Komatsu fittings, by contrast, use a 30° flare and are typically found on Japanese excavators, cranes, and utility vehicles. Despite visual similarities to JIC, the flare angle and thread pitch differ, making them incompatible without a dedicated adaptor. Some metric threads also follow OEM-specific designs, particularly on Komatsu equipment.
Why Hydraquip Is the UK’s Trusted Supplier for Hydraulic Adaptors
Hydraquip Hose & Hydraulics provides 24/7 nationwide support for hydraulic failures, and hydraulic adaptors play a key role in that service. When a hose fails, it’s not just the hose that needs replacing. Adaptors are often damaged, worn, or no longer compatible with updated components. That’s why every Hydraquip mobile unit is stocked with a full range of adaptors.
Our engineers are trained to measure, identify, and install the correct adaptor the first time, using the appropriate sealing method for each thread type. Combined with our Job Manager platform, which tracks every job from booking to completion, we ensure parts are matched quickly and accurately. This reduces downtime and keeps machinery operational without unnecessary delays or second visits.
From heavy construction plant to specialist OEM systems, we’re equipped to handle the wide range of fittings in use across UK industries, all backed by a service that’s available day or night.
Summary
Correctly identifying and fitting hydraulic adaptors is essential to keeping hydraulic systems running safely and efficiently. BSP, JIC, and metric threads each require specific handling, and mistakes in selection or installation lead directly to leaks, pressure failure, or costly delays. That’s why accuracy matters, especially during breakdowns.
At Hydraquip Hose & Hydraulics, we combine technical precision with 24/7 national coverage. Our engineers carry the tools, knowledge, and stock to specify and install the right adaptor on site, first time. Whether you’re working with UK-standard threads, imported OEM equipment, or a mix of both, we’re ready to respond.
Get in touch with the expert team today or through our Job Manager system if the emergency is out of hours to ensure your downtime is kept to a minimum.
