BSP Parallel Male x BSP Tapered Male 90° Compact Elbow

The parallel-to-tapered BSP crossover in a 90° body. One end seals on a washer, the other on the thread, which makes this the fitting for getting off a tapered port into parallel plumbing at a right angle.

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 Parallel Male – BSPP to ISO 228. It seals on a bonded washer against the port face or on a 60° cone, never on the thread itself.
• 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.

How to Choose

• BSPP and BSPT share the same 55° thread form and pitch, so they start into each other happily and then leak. Identify the port before ordering.
• The tapered end needs tape or sealant. The parallel end needs a bonded washer and must stay dry.
• A tapered thread has a visible taper along its length; a parallel one measures the same at both ends.

Where You’ll Find It

• BSP Parallel Male – Valve and manifold ports on Australian, British and Asian-built equipment, and most locally made hose ends. The default port thread on Australian truck and agricultural hydraulics.
• BSP Tapered Male – Older Australian and British pipework, gauge ports, tank and return lines, and cast pump and gearbox housings.

Cross-Reference

• BSP Parallel Male – BSPP to ISO 228 / BS 2779, written G. Also called BSP parallel or gas thread.
• BSP Tapered Male – BSPT to ISO 7 / BS 21, written R for male. Sometimes labelled PT or BSP taper.

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.

Technicians Advice

Because both ends are male BSP they look nearly identical in your hand. Mark the tapered end before you start so you tape the right one, since taping the parallel end and washering the tapered end is a leak that can take an hour to find on a machine.

📐Dimensions & thread sizes – every size in this range

← Swipe the table sideways to see every measurement →

Part code	A	B	H	S1	Material	Finish
BPM-BTM-90C-0404	1/4" BSPT	1/4" BSPP	19mm	14mm	Mild steel	Plated finish
BPM-BTM-90C-0604	1/4" BSPT	3/8" BSPP	22mm	16mm	Mild steel	Plated finish
BPM-BTM-90C-0606	3/8" BSPT	3/8" BSPP	22mm	16mm	Mild steel	Plated finish
BPM-BTM-90C-0608	1/2" BSPT	3/8" BSPP	22mm	22mm	Mild steel	Plated finish
BPM-BTM-90C-0806	3/8" BSPT	1/2" BSPP	27mm	22mm	Mild steel	Plated finish
BPM-BTM-90C-0808	1/2" BSPT	1/2" BSPP	27mm	22mm	Mild steel	Plated finish
BPM-BTM-90C-0812	3/4" BSPT	1/2" BSPP	27mm	27mm	Mild steel	Plated finish
BPM-BTM-90C-1208	1/2" BSPT	3/4" BSPP	32mm	27mm	Mild steel	Plated finish
BPM-BTM-90C-1212	3/4" BSPT	3/4" BSPP	32mm	27mm	Mild steel	Plated finish
BPM-BTM-90C-1216	1" BSPT	3/4" BSPP	27mm	33mm	Mild steel	Plated finish
BPM-BTM-90C-1612	3/4" BSPT	1" BSPP	41mm	33mm	Mild steel	Plated finish
BPM-BTM-90C-1616	1" BSPT	1" BSPP	41mm	33mm	Mild steel	Plated finish
BPM-BTM-90C-2020	1.1/4" BSPT	1.1/4" BSPP	50mm	41mm	Mild steel	Plated finish
BPM-BTM-90C-2424	1.1/2" BSPT	1.1/2" BSPP	55mm	48mm	Mild steel	Plated finish
BPM-BTM-90C-2016	1" BSPT	1.1/4" BSPP	50mm	41mm	Mild steel	Plated finish

Key: H centre to face, 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)

Same Threads, Other Angles

🔗 Straight – same threads🔗 45° Compact – same threads

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Need a hand? Call 1300 146 737 or email sales@mhfgc.com.au – real technicians, real answers.