Hydraulic Adapters

Name both ends before anything else

One standard per connection

Size range

Every size above is a part number you can quote from. Open any listing for its full table.

Delivery

Hydraulic Adapters across the Gulf

Questions we get asked

About this range

01How do I tell BSP, JIC, ORFS and metric apart?

By the seat and the thread together. JIC seals on a 37° flare with a UN/UNF thread; ORFS seals on an O-ring in a flat face, also on a UN thread; BSP hydraulic ends usually seal on a 60° cone with a Whitworth-form thread; metric 24° cone ends seal on the cone. Measure the thread diameter and pitch, look at the seat, and send a photo if in doubt.

02Is an adapter rated as high as the hose?

Not automatically. Each adapter has its own working pressure by size and form, and a tapered thread end in particular can be rated well below the hose. A circuit is limited by its lowest-rated component.

03Do you stock adapters for Japanese machines?

Yes — JIS gas and JIS metric 60° cone adapters for Japanese-built machines, and metric adapters made to Komatsu’s specification.

04How do I read a title like “Adjustable Branch Tee m ORFS X m BSP X m ORFS”?

Each end is named in turn, with m for a male end and f for a female end. In a tee, the ends are usually listed run, branch, run, so that title is an adjustable tee with ORFS male ends on the run and a BSP male on the branch. “Adjustable” means the stud end carries a locknut and O-ring, so the body can be turned to any direction before it is locked. Check the drawing on the listing to confirm which end is which before ordering, especially on run tees, where the odd end sits on the run rather than the branch.

05How do I fit an adjustable stud-end elbow or tee?

Wind the locknut back fully, screw the stud in by hand until the backup washer meets the port face, back it out by no more than one turn to point it where you need, then hold the body and tighten the locknut. Lubricate the O-ring with system fluid first, and check it has not been cut on the thread. Turning the body back the other way after the washer is seated, or tightening the locknut without holding the body, are the usual causes of a leak at the port.

06Can I reuse an adapter when a line is remade?

Often, if its sealing surfaces are undamaged, but the seals are renewed. O-rings, bonded seals and ED seals are replaced every time the joint is opened. Flare and cone seats can be remade if they show no nicks, radial scratches or distortion. Taper threads (NPT, BSPT) seal by deforming, so each remake goes a little deeper and a heavily reused taper end should be replaced. A bite-type ring stays on its own tube end. Discard any adapter with a cracked body, a stripped or galled thread or a coined seat.