Metric Banjo Bolts

The bolt half of a metric banjo connection, drilled through so the oil passes down the bolt and out into the eye.

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

Watch: Exploring Hydraulic Adaptors Part 1: Difference Between Branch Tee & Run Tee, Elbows Short and Long

Thread Standards

• BSP Banjo (eye fitting) – a drilled eye that a banjo bolt passes through, with the port thread on the bolt. It seals on a bonded washer either side of the eye, squeezed by the banjo bolt – two washers, not one.

How to Choose

• Two bonded washers, one each side of the eye. Not one.
• Drilled through for flow. An ordinary metric bolt of the same thread will block the circuit completely.
• Match bolt, eye and washers as a set.

Technicians Advice

Hold the eye at the angle you want and tighten the bolt against it. And check the drillings are clear before fitting, because a banjo bolt straight out of a box can carry swarf from manufacture.

Where You’ll Find It

• BSP Banjo (eye fitting) – tight installations where a hose has to leave a port at a set angle and there is no room to swing a fitting – brake and clutch lines, compressors, and cramped valve blocks.

Cross-Reference

• BSP Banjo (eye fitting) – Banjo / eye fitting to BSP. The eye swivels on the bolt until the bolt is tightened, which is why it suits awkward angles.

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	Hex	Material	Finish
MBB-10	17mm	Mild steel	Plated finish
MBB-12	17mm	Mild steel	Plated finish
MBB-14	19mm	Mild steel	Plated finish
MBB-16	22mm	Mild steel	Plated finish
MBB-18	24mm	Mild steel	Plated finish
MBB-22	27mm	Mild steel	Plated finish
MBB-26	32mm	Mild steel	Plated finish

Key: Hex across flats. 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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