FMSI > Fuel System > Fittings > Fuel Line Tube Nuts > Item # 3448 FMSIFMSI Fuel SystemFuel System FittingsFittings Fuel Line Tube NutsFuel Line Tube Nuts Item # 3448 Item # 3448, 5/16” x 14mm x 1.25 Steel Saginaw O-ring Flare Tube Nut (Japanese) 34485/16” x 14mm x 1.25 Steel Saginaw O-ring Flare Tube Nut (Japanese) Request Information Email This Page Download PDF Download PDF Printable Page /Asset/a1903.jpg /Asset/a1903.jpg Close Window - For 5/16” tube- 14mm x 1.25 thread- For use with GM Saginaw o-ring flare Unit of Measure Imperial Metric Both Specifications Tube Size N/A 5/16 in Thread Diameter N/A 14 mm Thread Pitch N/A 1.25 Color N/A Silver Packaging N/A SP(10) HP(2)