Quotes (0) FMSI > Brake System > Hardware > Tube Nuts > Female Tube Nuts > Item # 3489 FMSIFMSI Brake SystemBrake System HardwareHardware Tube NutsTube Nuts Female Tube NutsFemale Tube Nuts Item # 3489 Item # 3489, 5/16" x 1/2"-20 Female Steel Tube Nut 34895/16" x 1/2"-20 Female Steel Tube Nut Request Information Email This Page Download PDF Download PDF Printable Page Close Window Unit of Measure Imperial Metric Both Specifications Tube Size N/A 5/16 in Thread Diameter N/A 1/2 in Thread Pitch N/A 20 T.P.I