BSP Swivel Female x Tubeweld Female Straight Weld-On Adaptor

A BSP swivel female one end and a plain weld socket the other. Lets a hose land on a fabricated tube run without twisting.

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 Swivel Female – BSPP to ISO 228 with a 60° internal cone seat. It seals on the cone and swivels, so it needs no tape or sealant.
• Tubeweld Female (weld-on socket) – plain-bore socket sized to a tube OD, joined by welding rather than a thread. It has no seal of its own – the weld is the joint, so the tube must be clean, square and correctly prepared.

How to Choose

• Sized by tube outside diameter, not by thread. Measure the tube with vernier calipers rather than going by what the old fitting says.
• The swivel female seals on its 60° cone and turns freely. Nothing on that thread.
• Protect the swivel nut and cone from weld spatter. A pitted cone will never seal.

Technicians Advice

Wrap the swivel end or back the nut off and cover it before you weld. Spatter on a cone seat is the most common way a brand new weld-on fitting ends up leaking, and you cannot polish it out.

Where You’ll Find It

• BSP Swivel Female – Hose ends across Australian-built assemblies, and anywhere a joint has to be broken and remade repeatedly.
• Tubeweld Female (weld-on socket) – fabricated tube runs on machinery builds, tank and reservoir plumbing, and repairs where a threaded connection is not wanted or there is no room for one.

Cross-Reference

• BSP Swivel Female – BSPP body to ISO 228 with a 60° cone seat. Commonly called a BSP swivel or BSP female cone seat.
• Tubeweld Female (weld-on socket) – Weld-on socket, also called a weld nipple, weld boss or tubeweld end. Sized by tube outside diameter, not by thread.

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	L	H	Material	Finish
BSF-TWF-0404	1/4" BSPP	1/4" Tube	20mm	19mm	Mild steel	Plated finish
BSF-TWF-0606	3/8" BSPP	3/8" Tube	22mm	22mm	Mild steel	Plated finish
BSF-TWF-0608	3/8" BSPP	1/2" Tube	22mm	22mm	Mild steel	Plated finish
BSF-TWF-0808	1/2" BSPP	1/2" Tube	24mm	27mm	Mild steel	Plated finish
BSF-TWF-1212	3/4" BSPP	3/4" Tube	27mm	32mm	Mild steel	Plated finish
BSF-TWF-1616	1" BSPP	1" Tube	30mm	38mm	Mild steel	Plated finish
BSF-TWF-2020	1.1/4" BSPP	1.1/4" Tube	*mm	50mm	Mild steel	Plated finish
BSF-TWF-2424	1.1/2" BSPP	1.1/2" Tube	*mm	55mm	Mild steel	Plated finish
BSF-TWF-3232	2" BSPP	2" Tube	*mm	70mm	Mild steel	Plated finish

Key: L overall length, H centre to face. 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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