Comparison : Item # 3008, 3/8” x 16mm x 1.50 Steel Saginaw O-ring Flare Tube Nut (GM)
Item # 3009, 5/16” x 14mm x 1.50 Steel Saginaw O-ring Flare Tube Nut (GM)
Item # 3445, 5/16” x 14mm x 1.50 Steel Saginaw O-ring Flare Tube Nut (GM/Japanese)
Item # 3448, 5/16” x 14mm x 1.25 Steel Saginaw O-ring Flare Tube Nut (Japanese)
Item # 3487, 5/16” x 14mm x 1.50 Steel Saginaw O-ring Flare Tube Nut (Toyota Coated)