Comparison : Item # 3043, 3/16" x 10mm x 1.0 Steel Invert Flare Tube Nut (Japanese)
Item # 121050, 3/16" x 10mm x 1.0 Steel Invert Flare Tube Nut (Toyota/GM-Long)
Item # 3449, 3/16" x 10mm x 1.0 Steel Invert Flare Tube Nut (Toyota OE)
Item # 3413, 1/4" x 12mm x 1.0 Steel Invert Flare Tube Nut (Ford/Imports)
Item # 3407, 3/16" x 12mm x 1.0 Steel Invert Flare Tube Nut (Domestic/Japanese)