Swagelok 1/2" Union SS-810-6, 316 Stainless Tube Fitting
ABOUT THIS PART
Genuine Swagelok SS-810-6 union, 1/2 inch tube OD on both ends, 316 stainless. It joins two 1/2 inch tubes. It is not a reducer, and the part number trips people up on that, so it is worth saying first. $24.00, down from $38.00.
SPECIFICATIONS
| Type | Union, straight tube fitting |
|---|---|
| Manufacturer | Swagelok, genuine |
| Part number | SS-810-6 |
| Swagelok description | Stainless steel Swagelok tube fitting, union, 1/2 in. tube OD |
| Connection 1 | 1/2 in. Swagelok tube fitting |
| Connection 2 | 1/2 in. Swagelok tube fitting |
| Reducer | No. Both ends are 1/2 in. tube OD |
| Bulkhead | No |
| Body material | 316 stainless steel |
| Series | Swagelok tube and adapter fittings |
| Cleaning | Standard cleaning and packaging, SC-10 |
| Maximum pressure, per 3P Certz ECR-190031-R0 | 2600 psi (179 bar) |
| Working pressure of your line | Set by the tube wall and the weakest component on the circuit, not by the fitting |
| Price | $24.00, down from $38.00 |
| On hand | 16 |
| Panel pass-through alternative | Superlok SBHU-8 bulkhead union, 1/2 in. both sides, $25.00 |
| Four-way alternative | Superlok SUC-8 union cross, four 1/2 in. ports, $45.00 |
| Not included | Tube, and spare nut and ferrule sets |
| Built or stocked | Stocked in Bend |
Sixteen on the shelf in Bend. For comparison, in October 2026 this part was listed at $67.82 new, $32.90 unused in original packaging, $28.65 unused and repackaged, and $25.47 refurbished. $24.00 is below all four, and these are unused and shipping from here rather than on a lead time.
Specifications, as Swagelok publishes them
| Part number | SS-810-6 |
| Description | Stainless steel Swagelok tube fitting, union, 1/2 in. tube OD |
| Connection 1 | 1/2 in. Swagelok tube fitting |
| Connection 2 | 1/2 in. Swagelok tube fitting |
| Body material | 316 stainless steel |
| Series | Swagelok tube and adapter fittings |
| Cleaning | Standard cleaning and packaging, SC-10 |
| Price | $24.00, down from $38.00 |
| On hand | 16 |
The rating, and where it comes from
- 3P Certz engineering report ECR-190031-R0 lists this exact part, Swagelok SS-810-6, 1/2 inch tube union, 316 stainless housing, at a maximum pressure of 2600 psi (179 bar).
- That figure tracks the tubing, not the fitting body. Your working pressure is set by your tube wall and by the weakest component on the circuit.
- More on how components on our builds get certified in certifications and compliance.
Fitment
- 1/2 inch OD tube on both ends. Not a reducer, not a bulkhead union, not a tube-to-NPT adapter.
- Not a tri-clamp part and not a hose fitting.
- Nuts and ferrules are on the fitting, one set per end. Tube and spare nut and ferrule sets are separate items.
- Superlok and Swagelok tube fittings interchange. We have verified it and run the two brands together on our own builds. Swagelok will not warrant an assembly made up with another maker's parts, so if your paperwork calls for one brand throughout, match it.
If a plain union is not what you need
- Through a panel or an enclosure wall: the Superlok SBHU-8 bulkhead union, 1/2 inch both sides, $25.00.
- Four ways instead of two: the Superlok SUC-8 union cross, four 1/2 inch ports, $45.00.
- Both of those are Superlok rather than Swagelok, and they interchange with this union. We run the two brands together on our own builds.
$24.00, priced on this page rather than behind a quote form. Sixteen on the shelf. Ships from Bend, Oregon.
| FITS | 1/2 inch OD tube on both ends, for joining two 1/2 inch tubes in a straight run. It is not a reducer, not a bulkhead union, not a tube-to-NPT adapter, not a tri-clamp part and not a hose fitting. Nuts and ferrules are on the fitting, one set per end; tube and spare sets are separate items. For a panel pass-through in the same size use the Superlok SBHU-8 bulkhead union, and for four ways use the Superlok SUC-8 union cross. |
|---|
▦ IN YOUR MANUAL
This part appears in the operator manual that ships with your system. The QR code there links to this page.
◈ REFERENCE FOR THIS PART
COMMON QUESTIONS
Is the SS-810-6 a reducer?
No. Both ends are 1/2 inch tube OD. The part number reads like a reducer to people used to Swagelok's numbering, which is why we say it up front.
Is it genuine Swagelok?
Yes. Part number SS-810-6, 316 stainless, Swagelok tube fitting both ends.
What is it rated for?
3P Certz engineering report ECR-190031-R0 lists Swagelok SS-810-6, 1/2 inch tube union, 316 stainless housing, at a maximum pressure of 2600 psi (179 bar). That figure follows the tubing. In practice your circuit is limited by your tube wall and the weakest component on it.
Does it come with nuts and ferrules?
Yes, one set per end, on the fitting. Tube and spare sets are separate items.
Can I use Superlok nuts and ferrules on it?
Yes. Superlok and Swagelok interchange, and we have verified it on our own builds. Swagelok will not warrant a mixed assembly, so if your paperwork calls for one brand throughout, match it.
Is it a bulkhead union?
No. For a panel pass-through in 1/2 inch we stock the Superlok SBHU-8 bulkhead union at $25.00.
What if I need more than two ways?
The Superlok SUC-8 union cross gives four 1/2 inch ports for $45.00.
How many do you have?
Sixteen on the shelf. Inventory is tracked on this page, so the number you see is the number we have, and it stops selling at zero rather than taking a backorder.
Why is it cheaper here than everywhere else?
In October 2026 this part was listed at $67.82 new, $32.90 unused in original packaging, $28.65 unused and repackaged, and $25.47 refurbished. Ours are unused, on the shelf in Bend, and priced below all four.
What does it cost?
$24.00, down from $38.00, priced on this page.