Fuel Line Quick Connector Metric M18X1.5 Male to 10mm Bundy Male Tube

Bundy Fittings - COUPLER FITTINGS

Tube nut

M18-1.5 x M14-1.5 Steel Male Metric - Male Metric Connector 73073L-12-08 - Prairie Bearing & Bolt

Male Fuel Hose Quick Connect Splice Fittings

DYNAPEX

2x 9.49 9.89 11.8 15.82 mm Stainless Steel Fuel Male Quick Thread connectors - AliExpress

Fitting Angle: Straight Fitting Attachment 1: 5/16 inch Male Quick-Connect Tube Fitting Attachment 2: M14x1.5 Male Metric Thread Note: Tubing works

Fitting Fuel Line Quick Connector Metric M14 M14X1.5 & 5/16 Bundy Male Tube

2x 9.49 9.89 11.8 15.82 mm Stainless Steel Fuel Male Quick Thread connectors - AliExpress

REFERENCE: 1.8t Fuel Lines/ Fueling FAQ