Amazon.com: TAILONZ PNEUMATIC 304 Stainless Steel Male Elbow - 1/2 Inch Tube OD x 1/2 Inch NPT Thread 90 Push to Connect Tube Fitting PL-1/2-N4 (Pack of 2) : Industrial & Scientific
316 Stainless Steel Tube Fittings Male Connector - 316L stainless steel (inox 316) two ferrules tube fittings male connector, 316 stainless steel(inox 316) double ferrules compression tube fitting male connector, 316 stainless
316 Dual Spoke Stainless Steel Fitting for Square Tube 1-9/16" by 1-9/16" | Indital USA
Amazon.com: Metalwork 304 Stainless Steel Compression Tube Fitting Male Connector Adapter 3/8" NPT Male x 10mm OD (2 Pcs) : Industrial & Scientific