Swagelok's part numbers are practically a language of their own — SS-400-6, for instance, decodes to 316 stainless steel, the 400-series fitting body, and a 3/8-inch tube connection — which makes matching an existing fitting mostly a matter of reading the code correctly rather than describing the part in words. Z & F Corporation Ltd supplies 337 genuine Swagelok lines, all of it precision tube fittings, valves, and instrumentation connection hardware.
What You'll Find
- Tube fittings — unions, elbows, tees, and reducing fittings, in 316 stainless steel, brass, and PTFE.
- Ball & diaphragm-sealed valves — for instrumentation and process isolation duty, including multi-way configurations.
- VCO & VCR face-seal fittings — for high-purity or high-pressure connections where a standard compression fitting isn't appropriate.
- Tube supports & accessories — clamp-style supports and back ferrules for building out a complete tubing run.
316 stainless steel accounts for the large majority of what we hold, reflecting its use in instrumentation and process service; brass covers lower-pressure utility lines, and PTFE is specified where chemical compatibility rules out metal. If you're not confident reading the part number off the fitting, a clear photo showing the full stamped code is normally all we need to confirm it.
Matching by Tube Size & Material
A fitting that's correct on tube size but wrong on material, or vice versa, will not seal reliably. If the stamped code is worn or unreadable, the tube outer diameter and the material (steel colour and finish are a rough guide) are the two details worth confirming before ordering.
We are not Swagelok, and not an authorised Swagelok distributor — genuine stock only, sourced and supplied independently, with any brand-specific disclosure noted on the relevant product page. This range sits within our wider Instrumentation stock. Orders ship worldwide with export documentation as standard; instrumentation and process engineering contractors across the GCC and South Asia are regular customers for this range alongside the UK.
Frequently Asked Questions
How do I read a Swagelok part number?
It generally breaks down into material (e.g. SS for 316 stainless), fitting series/body type, and tube size — send us a clear photo of the full stamped code and we'll confirm the exact fitting for you rather than you needing to decode it yourself.
What's the difference between a standard tube fitting and a VCO/VCR fitting?
VCO and VCR are face-seal fittings used for high-purity or high-pressure connections where a standard compression fitting isn't suitable — they're not a drop-in substitute for one another.
Can you match a fitting if the stamped code is worn away?
Often yes — the tube outer diameter and the material are usually enough to narrow it down, especially alongside a photo of the fitting's shape.
