BSP Tapered Male x Metric Light (L) Male Straight Adaptor

BSPT to DIN 2353 light-series metric in a straight nipple. The common European-to-local crossover on return, drain and pilot lines where the light series is the correct specification.

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

Watch: How to Identify Hydraulic Hose Fittings and Hydraulic Adaptors JIC and BSP

Thread Standards

• BSP Tapered Male – BSPT to ISO 7 / BS 21. It seals on the tapered thread itself, so it needs PTFE tape or a liquid thread sealant.
• 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

• Light series suits moderate pressure. Do not substitute it where heavy series was originally fitted.
• Metric sizing follows tube outside diameter, not thread diameter.
• BSPT end takes tape or sealant; the 24° metric cone must stay dry.

Technicians Advice

Check whether the mating cone carries a soft seal or runs bare metal and match it. A soft-seal cone against a hard-seal counterpart pulls up tight and still weeps, because the O-ring carries no load and the metal faces were never meant to seal on their own.

Where You’ll Find It

• BSP Tapered Male – Older Australian and British pipework, gauge ports, tank and return lines, and cast pump and gearbox housings.
• 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

• BSP Tapered Male – BSPT to ISO 7 / BS 21, written R for male. Sometimes labelled PT or BSP taper.
• 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	A	B	F1	F2	L	S	C1	C2	D1	D2	P	Material	Finish
BTM-MLM-0212	M12x1.5 - 6L	1/8" BSPT	M12x1.5 - 6L	1/8" BSPT	24mm	12mm	10mm	10mm	4mm	4mm	6mm	Mild steel	Plated finish
BTM-MLM-0214	M14x1.5 - 8L	1/8" BSPT	M14x1.5 - 8L	1/8" BSPT	26mm	14mm	10mm	10mm	6mm	4.5mm	8mm	Mild steel	Plated finish
BTM-MLM-0216	M16x1.5 - 10L	1/8" BSPT	M16x1.5 - 10L	1/8" BSPT	26mm	17mm	11mm	10mm	8mm	4.5mm	10mm	Mild steel	Plated finish
BTM-MLM-0412	M12x1.5 - 6L	1/8" BSPT	M12x1.5 - 6L	1/8" BSPT	28mm	17mm	10mm	14mm	4mm	6mm	6mm	Mild steel	Plated finish
BTM-MLM-0414	M14x1.5 - 8L	1/4" BSPT	M14x1.5 - 8L	1/4" BSPT	30mm	17mm	10mm	14mm	5.94mm	5.94mm	8mm	Mild steel	Plated finish
BTM-MLM-0416	M16x1.5 - 10L	1/4" BSPT	M16x1.5 - 10L	1/4" BSPT	28.5mm	17mm	11mm	14mm	6mm	6mm	10mm	Mild steel	Plated finish
BTM-MLM-0418	M18x1.5 - 12L	1/4" BSPT	M18x1.5 - 12L	1/4" BSPT	30mm	19mm	11mm	12.5mm	10mm	6mm	12mm	Mild steel	Plated finish
BTM-MLM-0614	M14x1.5 - 8L	3/8" BSPT	M14x1.5 - 8L	3/8" BSPT	32.5mm	19mm	10mm	15mm	6mm	9mm	8mm	Mild steel	Plated finish
BTM-MLM-0616	M16x1.5 - 10L	3/8" BSPT	M16x1.5 - 10L	3/8" BSPT	31mm	19mm	11mm	14mm	8mm	8mm	10mm	Mild steel	Plated finish
BTM-MLM-0618	M18x1.5 - 12L	3/8" BSPT	M18x1.5 - 12L	3/8" BSPT	30mm	19mm	11mm	12mm	9mm	9mm	12mm	Mild steel	Plated finish
BTM-MLM-0622	M22x1.5 - 15L	3/8" BSPT	M22x1.5 - 15L	3/8" BSPT	31mm	24mm	12mm	15mm	12mm	9mm	15mm	Mild steel	Plated finish
BTM-MLM-0814	M14x1.5 - 8L	1/2" BSPT	M14x1.5 - 8L	1/2" BSPT	36mm	22mm	10mm	19mm	6mm	12mm	8mm	Mild steel	Plated finish
BTM-MLM-0816	M16x1.5 - 10L	1/2" BSPT	M16x1.5 - 10L	1/2" BSPT	32mm	22mm	11mm	14mm	8mm	12mm	10mm	Mild steel	Plated finish
BTM-MLM-0818	M18x1.5 - 12L	1/2" BSPT	M18x1.5 - 12L	1/2" BSPT	33mm	24mm	11mm	16mm	10mm	10mm	12mm	Mild steel	Plated finish
BTM-MLM-0822	M22x1.5 - 15L	1/2" BSPT	M22x1.5 - 15L	1/2" BSPT	34mm	24mm	12mm	16mm	12mm	12mm	15mm	Mild steel	Plated finish
BTM-MLM-0826	M26x1.5 - 18L	1/2" BSPT	M26x1.5 - 18L	1/2" BSPT	38.5mm	27mm	12mm	19mm	15mm	12mm	18mm	Mild steel	Plated finish
BTM-MLM-1226	M26x1.5 - 18L	3/4" BSPT	M26x1.5 - 18L	3/4" BSPT	35mm	32mm	12mm	16mm	15mm	15mm	18mm	Mild steel	Plated finish
BTM-MLM-1230	M30x2 - 22L	3/4" BSPT	M30x2 - 22L	3/4" BSPT	41mm	32mm	14mm	20mm	16.7mm	16.7mm	22mm	Mild steel	Plated finish
BTM-MLM-1630	M30x2 - 22L	1" BSPT	M30x2 - 22L	1" BSPT	46mm	41mm	14mm	24mm	16.7mm	22.2mm	22mm	Mild steel	Plated finish
BTM-MLM-1636	M36x2 - 28L	1" BSPT	M36x2 - 28L	1" BSPT	48mm	41mm	14mm	24mm	23mm	23mm	28mm	Mild steel	Plated finish
BTM-MLM-2045	M42x2 - 35L	1.1/4" BSPT	M42x2 - 35L	1.1/4" BSPT	51mm	46mm	16mm	25mm	28.6mm	28.6mm	35mm	Mild steel	Plated finish
BTM-MLM-2452	M52x2 - 42L	1.1/2" BSPT	M52x2 - 42L	1.1/2" BSPT	52mm	55mm	16mm	25mm	36mm	33.3mm	42mm	Mild steel	Plated finish

Key: L overall length, S hex across flats, C1 across corners 1, C2 across corners 2, D1 bore 1, D2 bore 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)

Same Threads, Other Angles

🔗 90° Compact – same threads

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