Metric Bulkhead Male x Metric Light (L) Male Straight Bulkhead Adaptor

A metric bulkhead body one end and a light series metric male cone the other. The everyday metric panel pass-through for return, drain and pilot lines.

Brand: Ayrtec – mild steel body with a plated finish, manufactured to the standards listed below.

Watch: The Advantages of Hydraulic Bulkhead Fittings: Essential Components for Fluid Systems

Thread Standards

• Metric Bulkhead Male – DIN 2353 / ISO 8434-1 24° cone on a bulkhead body with a locknut. It seals on the 24° cone; the bulkhead thread and locknut clamp the body to the panel and do no sealing.
• Metric Light (L) Male – DIN 2353 / ISO 8434-1 24° cone, light series. It seals on the 24° cone, normally with an O-ring captured in the cone.

How to Choose

• The bulkhead thread and locknut clamp the fitting to the panel. They do no sealing, so do not try to cure a leak by tightening the locknut.
• Check your panel hole size and thickness before you order. The body has a set thread length under the shoulder and a thick panel eats it.
• Light (L) is the lower rated metric range. Check the circuit before using it on a pump line.
• L and S share some thread sizes and the cones differ, so go by the series on the tube nut.

Technicians Advice

Small metric cones seal at low torque. Bring the cone up until it loads and stop, and treat the locknut as a separate job entirely rather than something that helps the seal.

Where You’ll Find It

• Metric Bulkhead Male – panel, chassis and tank-wall pass-throughs on European-built machinery – Liebherr, Wacker Neuson, Atlas, Manitou – and any tidy tube-work build.
• Metric Light (L) Male – European-built machinery – Liebherr, Wacker Neuson, Atlas, Sennebogen, Manitou – and imported tube assemblies. Light series suits return, drain and pilot lines.

Cross-Reference

• Metric Bulkhead Male – DIN 2353 / ISO 8434-1 24° cone, bulkhead style. Parker call this range EO and EO-2. Available in both light (L) and heavy (S) series, which do not interchange.
• Metric Light (L) Male – DIN 2353 / ISO 8434-1 24° cone, light (L) series. Parker call this range EO and EO-2, historically branded Ermeto. Also called bite type.

Parker, Gates, Aeroquip and Ryco all manufacture to these same standards under their own part numbering, so a fitting built to the standard above will mate with theirs.

Cross-references are given at series level as a guide to the standard, not as a part-for-part substitution. Always confirm the thread form, size and seal type against the port before ordering.

📐Dimensions & thread sizes – every size in this range

← Swipe the table sideways to see every measurement →

Part code	L	S	S1	Material	Finish
MBM-MLM-1212	48mm	–	–	Mild steel	Plated finish
MBM-MLM-1414	49mm	–	–	Mild steel	Plated finish
MBM-MLM-1616	52mm	–	–	Mild steel	Plated finish
MBM-MLM-1818	53mm	–	–	Mild steel	Plated finish
MBM-MLM-2222	57mm	27mm	30mm	Mild steel	Plated finish
MBM-MLM-2626	61mm	32mm	36mm	Mild steel	Plated finish
MBM-MLM-3030	66mm	36mm	41mm	Mild steel	Plated finish
MBM-MLM-3636	70mm	41mm	46mm	Mild steel	Plated finish
MBM-MLM-4545	76mm	50mm	55mm	Mild steel	Plated finish
MBM-MLM-5252	77mm	60mm	65mm	Mild steel	Plated finish

Key: L overall length, S hex across flats, S1 hex across flats 2. Measurements in millimetres unless shown otherwise. Thread columns show what each end mates with. Dimensions are nominal – check critical clearances against the part.

Downloads

📄 Thread Identification Chart (PDF)

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