DELPHI FITTINGS
Metric Hydraulic Adapters
The Essential Connectors for a Global Shop Floor.
Making American and Metric Systems Play Nice.
"Metric fittings" is a catch-all term for what you'll find on most equipment built in Europe and Asia. Unlike the JIC or NPT fittings we're used to, "metric" can mean a few different things. The most common type you'll run into is the DIN 2353 / ISO 8434-1 "bite-type" compression fitting. It uses a little cutting ring that bites into the tube to create a hell of a strong seal.
Our main job here is to make your life easier. We manufacture a whole range of rugged, zinc-plated steel adapters that let you cleanly connect the American standards you stock—like JIC, ORFS, and NPT—to the metric ports and lines you find on international machinery. Getting the right adapter is everything. We machine these to spec so you can make a reliable connection without having to cobble something together. Take a look at the adapters below, and read the field guide to figure out exactly what you're dealing with.
Metric Fitting & Adapter Catalog (Steel)
ORFS Male x Metric Male Adapter
Part #: 6068 / 6605Straight adapter connecting a female ORFS swivel fitting to a female Metric port (specific metric standard may vary, typically DIN/ISO parallel).
ORFS Male x Metric Male 90° Elbow
Part #: 606990° adapter elbow connecting a female ORFS swivel fitting to a female Metric port (specific metric standard may vary).
ORFS Male x ORFS Male x Metric Male Run Tee
Part #: 6168Tee adapter connecting two female ORFS swivels on the run and one female Metric port on the branch.
ORFS Male x ORFS Male x Metric Male Branch Tee
Part #: 6169Tee adapter connecting one female ORFS swivel on the run and one female Metric port on the run, with one female ORFS swivel on the branch.
Metric Male x Metric Male Union
Part #: 9001Straight union connecting two female Metric ports of the same size and standard (e.g., DIN Light to DIN Light).
BSPP Male x Metric Male Adapter
Part #: 9004Straight adapter connecting a female BSPP port (using bonded seal) to a female Metric port (specific metric standard may vary).
Metric Male x Female BSPP Adapter
Part #: 9018Straight adapter connecting a male BSPP fitting into a female Metric port (specific metric standard may vary).
BSPP Male x Female Metric Swivel Adapter
Part #: 9019Straight adapter connecting a male Metric fitting to a female BSPP port (using bonded seal), featuring a metric swivel nut.
JIC Male x Female Metric Swivel Adapter
Part #: 9022Straight adapter connecting a male Metric fitting to a female JIC swivel fitting/tube.
JIC Male x Female Metric Adapter
Part #: 9022FStraight adapter connecting a male Metric fitting into a female JIC swivel fitting/tube (non-swivel metric end).
Metric Male x Female JIC Swivel Adapter
Part #: 9024Straight adapter connecting a male JIC flare fitting/tube to a female Metric port (specific metric standard may vary).
Metric Hollow Hex Socket Plug
Part #: 9029 / 9029ASeals a female Metric port. Male metric thread (likely parallel) with an internal hex drive. Requires appropriate seal (O-ring/bonded).
Metric Hex Head Plug
Part #: 9030MSeals a female Metric port. Male metric thread (likely parallel) with an external hex head. Requires appropriate seal (O-ring/bonded).
Female Metric x Female Metric Union
Part #: 9043MStraight union connecting two male Metric fittings of the same standard.
JIC Male x Metric Male 45° Elbow
Part #: 906645° adapter elbow connecting a female JIC swivel/tube to a female Metric port.
JIC Male x Metric Male Adapter
Part #: 9067 / 9068 / 9605 / 9606Straight adapter connecting a female JIC swivel/tube to a female Metric port.
JIC Male x Metric Male Adjustable Elbow/Fitting
Part #: 9069 / 9069LAdjustable position elbow or fitting adapting JIC Male to Metric Male connections (likely requires locknut).
JIC Male x JIC Male x Metric Male Adjustable Run Tee
Part #: 9168Tee adapter connecting two female JIC swivels/tubes on the run and one female Metric port on the adjustable branch.
JIC Male x JIC Male x Metric Male Adjustable Branch Tee
Part #: 9169Tee adapter connecting one female JIC swivel/tube and one female Metric port on the run, with one female JIC swivel on the adjustable branch.
Metric Male x Female NPTF Adapter
Part #: 9235Straight adapter connecting a male NPTF pipe/fitting into a female Metric port.
NPTF Male Pipe x Female Metric Adapter
Part #: 9325Straight adapter connecting a male Metric fitting into a female NPTF port.
JIC Male x Metric Compression/Port Adapter
Part #: 9605S / 9606SDual purpose adapter connecting female JIC swivel/tube to either a metric compression fitting port or a standard metric parallel port.
NPTF Male Pipe x Metric Compression/Port Adapter
Part #: 9607Dual purpose adapter connecting female NPTF port to either a metric compression fitting port or a standard metric parallel port.
Metric Compression/Port Male x Female NPTF Adapter
Part #: 9635S / 9636SDual purpose adapter connecting male NPTF pipe/fitting to either a metric compression fitting port or a standard metric parallel port.
Related Metric Accessories
Metric Bonded O-Ring Seal
Part #: 9500MM SeriesBonded seal (Dowty washer) specifically sized for sealing male metric parallel thread fittings against flat surfaces. Usually Buna-N.
The Shop Floor Guide to Metric Threads
Working on a machine from Germany, Japan, or Italy? You're in metric-land. Don't let it throw you. Most of what you'll find boils down to two main systems. Here’s how to tell what you're looking at.
System #1: The DIN 2353 Bite-Type (24° Cone)
This is the big one. It's the most common metric hydraulic fitting in the world. It's a compression fitting that doesn't require flaring the tube.
- How it works: You slide a nut and a little hardened steel ring (a ferrule or "cutting ring") over a piece of straight tubing. When you tighten the nut into the fitting body, the 24° cone inside forces that cutting ring to bite into the steel tube. This creates a super-strong mechanical grip and a metal-to-metal seal.
- How to Spot It: Look for the 24° cone inside the port and the separate nut and ferrule on the tube end. They come in two series: "L" for Light Duty and "S" for Heavy Duty/High-Pressure. The "S" series fittings are beefier.
System #2: Metric Straight Thread with a Seal (Like ORB or BSPP)
This is just like the modern American fittings, but with metric threads. The threads themselves are parallel and only provide clamping force. The seal is done by a separate part.
- How it works: The male fitting has straight threads and uses an O-ring (like an ORB) or a bonded seal washer (like a BSPP) that gets crushed against a machined flat face on the port.
- How to Spot It: You’ll see straight threads and either a groove for an O-ring near the hex, or a shoulder for a bonded seal to sit against. The port it goes into will be smooth and flat around the opening. Common standards are ISO 6149 and DIN 3852.
The Golden Rule: MEASURE, DON'T GUESS.
Metric threads are defined by their diameter and their pitch (the distance between threads), both in millimeters. An M22 x 1.5 thread has a 22mm outside diameter and a 1.5mm pitch. You need a set of calipers and a metric thread pitch gauge to be sure what you have. A lot of metric threads are close in size to American ones, but "close" is not good enough in hydraulics. "Close" is a leak waiting to happen.
The Bridge Between Your Inventory and Their Machine.
Stocking the right metric conversion adapters is the key to servicing a world of equipment. We're here to be your factory-direct source for the steel adapters that get the job done right. If you know what metric connection you need to adapt from, let's talk volume.
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