This is a brand-new old stock Swagelok SS-500-6-4 Stainless Steel Reducing Union 5/16 in. x 1/4 in. Tube OD.   

The body material is 316 Stainless Steel.

All of the front and back ferrules are new.

Sold “as pictured/as seen”.

See the photos and judge the condition for yourself.

Message me if you need additional information or photos.

This is an original vintage item – not a reproduction or a re-issue.

This item comes from a smoke-free and pet-free home.