Metric Male O-Ring Adapter with Bonded Seal 1EL

Why This Metric Male O-Ring Adapter with Bonded Seal 1EL Passes the Compliance Gate

The metric male O-ring adapter with bonded seal 1EL is a straight adapter with two different sealing systems on one body: the E end is a metric male O-ring stud end that seals with an elastomer O-ring in a shoulder groove, and the F end is a metric male stud end that seals with a metal-backed bonded seal washer against a flat spotface. One part therefore joins an O-ring port to a flat-face port without an extra joint, an extra nipple or a length of hose.

The matrix covers fifteen size combinations, pairing E end threads from M14X1.5 to M52X2 with F end threads from M14X1.5 to M48X2. Because the two ends use different seals, the adapter is not reversible and each end needs its own spare seal.

Core Advantages

1. Two sealing systems in one body – on this metric male O-ring adapter with bonded seal 1EL the E end uses an O-ring and the F end uses a bonded seal washer, so a mixed-port machine needs one part instead of two adapters.
2. Fifteen size combinations – E end M14X1.5 to M52X2, F end M14X1.5 to M48X2, covering most service ports found on metric equipment.
3. Bonded seal end for flat spotfaces – the captive washer centres itself on the thread and seals against a machined flat, which is the normal arrangement on many metric valve and pump ports.
4. Carbon steel with plated finish – bodies are machined from carbon steel and supplied with a protective plated finish as standard practice.
5. Replacement seals listed by size – the matrix gives the O-ring designation and the bonded seal designation for every code, so spare seals can be ordered without guesswork.

Technical Specifications

What Is a Metric Male O-Ring Adapter with Bonded Seal?

A metric male O-ring adapter with bonded seal is a straight stud adapter whose first end seals with an O-ring compressed between the fitting shoulder and a chamfered port mouth, and whose second end seals with a bonded seal: a metal washer with an elastomer element bonded to it, compressed between the fitting shoulder and a flat machined spotface on the port. It is not a double O-ring adapter and it is not a 60 degree cone seat fitting.

The metric male O-ring adapter with bonded seal 1EL is used where two different port preparations meet on one machine. A single rubber O-ring cannot be substituted for a bonded seal washer, and a bonded seal washer cannot be substituted for an O-ring, because the two parts seal against different port geometries.

Connection 1 – Port Side E: Metric Male O-Ring Stud End

Connection 2 – Port Side F: Metric Male Stud End with Bonded Seal

The bonded seal end must land on a flat, undamaged spotface. If the port face is chamfered for an O-ring, this end will not seal, and a different adapter from the range should be selected instead.

Dimensional Data

Full Dimension Table (Part Number Matrix)

All dimensions are in millimetres and are transcribed from the published spec sheet for this series. The letter X in a thread callout is the pitch separator, so M14X1.5 means a 14 mm nominal metric thread with a 1.5 mm pitch, and the O-ring numbers are the inside diameter and the cross-section in millimetres.

Two entries need care when ordering. Code 1EL-14 carries the same thread M14X1.5 at both ends, but the E end still uses an O-ring and the F end still uses a bonded seal, so it is not a symmetric part. In code 1EL-16-18 the printed F end bonded seal is ZHD-16 while the F thread is M18X1.5; confirm the washer size against your port spotface before ordering.

Thread Size and Dash Chart

Matériaux et traitements thermiques

These values describe standard practice for this series rather than a customer-specific qualification. If your project carries its own material, plating or heat-treatment requirement, send it and the part will be quoted against it.

Working Pressure and Operating Envelope

This series is supplied without a single published pressure rating, because the working pressure is governed by the port standard together with the hose or fitting grade selected, and the finished assembly is only as strong as its weakest member. Pressure data for the metric male O-ring adapter with bonded seal 1EL can be issued against ISO or SAE requirements on request.

State the intended working pressure, the fluid and the applicable standard when ordering so that the correct grade is confirmed.

Temperature Range

Continuous service temperature is typically -40 °C to +120 °C for nitrile seals in a steel body, and it is set by the sealing elements and by the hose or tube in the circuit. The bonded seal washer is normally supplied with a nitrile element, and higher temperature service calls for a fluorocarbon option, available on request.

How to Read the Part Number Matrix

The order code has three blocks: the series prefix, the E end size, and the F end size.

The prefix 1EL means that the first end is a metric male O-ring stud end and the second end is a metric male stud end sealed by a bonded seal washer. When only one size block is printed, as in 1EL-14, both ends carry that thread size and the seals still differ.

Two warnings are worth repeating. The two size blocks cannot be swapped, because the O-ring end and the bonded seal end are different interfaces. A metric thread size can also exist in the cone seat systems, so the size code alone is never enough to order safely.

Selection and Ordering

Selection Checklist / Decision Table

Cross Reference Service

Send a photograph of the worn fitting, a rubbing of both threads, or the old order code from your own system, and the size combination will be converted free of charge. Quote both threads and both seal designations for this metric male O-ring adapter with bonded seal 1EL where they are known, because the two ends are not interchangeable. We quote and supply under the HENGHUA and Globhose brands only; we do not copy or re-brand another manufacturer’s product, and we do not print another company’s part number on any component.

Emballage et logistique

Installation and Fitment Guide

Step-by-Step Assembly

1. Identify the O-ring end and the bonded seal end, and confirm which port each one matches.
2. Check the O-ring port for a clean chamber and the bonded seal port for a flat, unscored spotface.
3. Fit a new O-ring to the groove and a new bonded seal washer over the thread of the other end.
4. Clean both threads and both seating faces, and remove any swarf.
5. Engage by hand until both shoulders contact, then tighten to the standard torque using the wrench flat S.
6. Run a short low-pressure check and inspect both faces for weeping before returning the machine to duty.

Torque and Sealing Notes

Tightening torque is taken from the applicable standard data table for each thread size, not from a rule of thumb. The two ends will not share one torque value, because the thread sizes and the sealing elements differ.

A bonded seal washer is a single-use item: once it has been crushed it will not seal again, so replace it every time the joint is opened. Thread sealant, tape and liquid pipe dope are unnecessary on either end and can introduce contamination into the circuit.

Installation Warnings

• Match each end to the correct port preparation before assembly.
• Use a new O-ring and a new bonded seal washer at every assembly.
• Keep the bonded seal spotface flat, clean and free of paint.
• Confirm the bonded seal size listed for your code against the port, especially on codes where the thread and the washer designation are not the same number.
• Use the correct wrench size S and avoid gripping the threads.

• Never fit the bonded seal end onto a chamfered O-ring port.
• Never reuse a crushed bonded seal washer.
• Never fit the O-ring end against a flat spotface without an O-ring chamber.
• Never use thread tape or liquid sealant to stop a leak at a shoulder.
• Never swap the two size blocks in the order code when reordering.

Applications and Industries

Mixed-port machines. Equipment built from European and other metric components often pairs an O-ring port with a flat-face port, and this adapter joins them in one joint.

Repair and replacement. Replacing a damaged stud on a pump or valve flange is faster when one part covers both port preparations.

Service trucks and workshops. Carrying one adapter family with two seal types reduces the number of loose parts needed for field repairs.

Hydraulic test benches. Both sealing systems tolerate repeated assembly when new seals are used each time, which suits rigs opened frequently.

Oil and gas, and industrial plant. Metric O-ring and flat-face ports appear on valve packages, power units, machine tools and presses, and the plated steel body suits normal industrial environments.

Industry tags: hydraulic adapter, metric O-ring fitting, bonded seal adapter, ZHD bonded washer, ISO 6149, manifold fitting, mobile hydraulics, oil and gas, industrial machinery, repair and maintenance.

OEM Customization and Quality Traceability

Private-label marking, laser marking of your own part number, non-standard plating, stainless bodies, special seal compounds and made-to-drawing geometries are available on this series. Send a drawing or a sample and a quotation with lead time is returned within 24 hours.

Traceability is handled at batch level: heat number on the label, material test report on request, and third-party inspection such as BV or SGS can be arranged. Hydraulic assemblies are pressure tested as part of the normal flow, and the adapter is one link in a chain that also includes the hose, the tube and the port.

FAQ

Q: Can I replace the bonded seal end with an O-ring? A: No. The two ends seal against different port geometries, and the adapter is supplied as a combination of an O-ring end and a bonded seal end.

Q: Is this adapter reversible? A: No. The metric male O-ring adapter with bonded seal 1EL has a defined O-ring end and a defined bonded seal end, and each must go to its matching port.

Q: What working pressure can this adapter carry? A: No single figure applies. Working pressure is governed by the port standard together with the hose or fitting grade selected, and the finished assembly is only as strong as its weakest member.

Q: How many times can a bonded seal washer be used? A: Once. The washer deforms to seal, so it should be replaced whenever the joint is opened, and spare washers are available by size code.

Q: 1EL-14 has the same thread at both ends – is it symmetric? A: No, the threads match but the seals do not, so one end always needs the O-ring and the other always needs the bonded seal washer.

Q: Which material and finish are supplied as standard? A: Carbon steel bodies with a plated finish and nitrile seals are standard practice. Stainless steel, zinc-nickel plating and high-temperature elastomers are available on request.

Q: How is the part packed and how fast can it ship? A: Thread protectors and anti-corrosion film, inner bag and export carton, with a batch label carrying the heat number. Standard sizes generally ship in batches in around seven days.

Demander un devis

To quote this metric male O-ring adapter with bonded seal 1EL accurately, send five items: the thread and pitch required at the O-ring end, the thread and pitch required at the bonded seal end, the working pressure and the fluid, the material and finish required, and the quantity with the required delivery date. Where the original part is unknown, send a photograph or a sample and both ends will be identified for you.

Quotations are returned within 24 hours, including lead time and packaging details for your destination. Bulk quantities, mixed size containers and private-label marking are all supported.

Browse the full Adaptateurs hydrauliques range for the complete family, or contact us to request a quote, mill test reports, and samples.