Product Overview
Swagelok SS-300-R-2 Straight Reducer: 3/16 in Tube Fitting to 1/8 in Tube Adapter, 316 Stainless, Unused
Condition
Unused, new old stock. The photographs show a bright, unmarked fitting with no swage marks on the nut, no wrench flats rounded or scored, and no discoloration on the tube stub. The body band is stamped with the Swagelok name, the 316 material mark, and a heat code; the nut face carries the same Swagelok and 316 stamping. Held against a fingertip in two of the photos for scale, this is a small fitting. The heat code characters are only partly legible in the photographs, so we do not transcribe them here.
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Product Overview
The SS-300-R-2 is a straight reducer that steps a 3/16 inch Swagelok tube fitting end down to a 1/8 inch Swagelok tube adapter end, letting two different tubing sizes join in a single compact body instead of a stack of adapters. It is built from 316 stainless steel, the same material stamped into the band between the two hexes, which is why this family shows up in chemical, laboratory, oilfield, and instrumentation runs where corrosion resistance matters. The part is not bored through and carries no flow restrictor, and it was supplied with Swagelok Standard Cleaning and Packaging (SC-10). Pressure ratings, temperature limits, and media compatibility are not confirmed here - check the current Swagelok data for this part number before you put it into a live system.
Key Features
- Manufacturer part number: SS-300-R-2
- Material: 316 stainless steel, with the 316 mark visible on the body band
- Connection 1: 3/16 in Swagelok tube fitting end
- Connection 2: 1/8 in Swagelok tube adapter stub end
- Not bored through
- No flow restrictor included
- Standard Cleaning and Packaging (SC-10)
- Condition: unused, new old stock
Applications
- Lab technician stepping a 3/16 in sample line down to a 1/8 in analyzer inlet without building an adapter stack
- Instrumentation tech plumbing a compact gauge or transducer takeoff inside a crowded enclosure
- Process maintenance crew replacing a single stainless reducer in an existing Swagelok assembly
- Bench builder assembling a small stainless gas or fluid panel where every inch of tube run counts
Frequently Asked Questions
What tubing sizes does this reducer join?
It connects 3/16 inch tubing at the fitting end to 1/8 inch at the tube adapter stub end, so it goes between a 3/16 in line and a 1/8 in port or fitting.
How do I know it is really 316 stainless?
The 316 mark is stamped into the band between the two hexes and again on the nut face. Two of the photographs are close-ups of that stamping so you can read it yourself before you buy.
Is it bored through, and does it have a restrictor?
No to both. This one is not bored through and no flow restrictor is fitted, which is what the original specification for this part number calls for.
Does it come with the nut and ferrules?
The nut is in place as photographed. The ferrules sit inside the nut and we did not disassemble the fitting for the camera, so we cannot confirm their presence or count - back the nut off and check on arrival, and treat ferrules as a verify-before-install item.
Why buy the two or three I need here instead of a multi-piece pack?
Reducers in this size are easy to find by the box and hard to find by the piece. We have six on the shelf and sell them individually, so if your manifold needs two, you buy two and skip the four you would otherwise store forever. Shipping is $8 flat rate and free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
A reducer is the quiet diplomat of a tubing run, the piece that lets a 3/16 line and a 1/8 line agree without anybody raising the pressure. This nut has never been pulled down on a tube - that first quarter turn is yours.
