Amazon.com: Legines Brass Pipe Fitting, 1/8" NPT Female to 1/8" NPT Male Adapter, 1200psi High Pressure (Pack of 2) : Industrial & Scientific
Amazon.com: AC PERFORMANCE Aluminum Flare Male -4AN to 1/8 NPT Male Hose Fitting Adapter, 4AN to 1/8'' NPT Union Fuel Oil Line Pipe Connector Black Anodized : Automotive
Push-in Fitting Ø 8 1/8” | E-Pneumatic Store
LTWFITTING 1/8 in. O.D. Brass Compression Coupling Fitting (10-Pack) HF62210 - The Home Depot
Geeetech Brass Straight Push In One-touch Fitting 1/8" Quick Coupler For Bowden Extruder - 3d Printer Parts & Accessories - AliExpress
B&K 1/8-in x 1/8-in Threaded Street Elbow Fitting in the Brass Fittings department at Lowes.com
B&K 1/8-in x 1/4-in Barbed Barb x Mip Adapter Fitting in the Brass Fittings department at Lowes.com
Push to Connect Tube Fitting Adapter 6mm OD x 1/8 NPT Straight Connecter 4pcs - Silver Tone,Black - Overstock - 29791855
1/8 NPT to 5/16 (8mm) Hose Barb Fitting, Brass - Straight | Pegasus Auto Racing Supplies
304SS 1/4" O.D Tube Fitting x 1/8" BSPP Male Connector - EQ-Fit-14-18BSPP
PARKER Reducing Adapter: Brass, 3/8 in x 1/8 in Fitting Pipe Size, Female NPT x Male NPT - 1DFY6|6-2 RA-B - Grainger