Buy the Swagelok Tube Fitting, 1/2 TO 3/8 in Reducing Union, Stainless Steel, Gaugeable, 1 ea., PN: SS-810-6-6 here.
Swagelok, SS-810-6-6, Stainless Steel Swagelok Tube
Ideal Spectroscopy Swagelok Tube Fitting, 1/8 in Union
Ideal Vacuum Swagelok Tube Fitting, 1/2 in Union, Stainless
Ideal Spectroscopy Swagelok Tube Fitting, 3/8 in Union
Ideal Vacuum Swagelok Bulkhead Reducing Union, 1/2 in. x 1/4 in
Ideal Vacuum Swagelok Tube Adapter Fitting, Reducer, 1/4, 56% OFF
Ideal Spectroscopy Swagelok Tube Fitting, 1/2 in Plug, Stainless
Ideal Spectroscopy Swagelok Tube Fitting, 3/8 in Union
Ideal Vacuum Swagelok Tube Fitting, 3/8 in Union, Stainless