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Tube Nuts & Hardline Adapters

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Items 1 - 25 of 25 Items
  • Earl's Hardline Tube Nut
    Earl's
    Earl's Hardline Tube Nut Tube Nut - Stainless Steel - 3/8"-24 Inverted Flare for 3/16" Tubing - Package of 5 pieces.

    Backordered

    Est. Ship Date: Coming Soon

    $20.89
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Adapter - Stainless Steel - 1/8" NPT Male to 1/2"-20 Inverted Flare Female

    In Stock

    $11.91
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Adapter - Stainless Steel - 1/8" NPT Male to 3/8"-24 Inverted Flare Female

    In Stock

    $11.92
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Adapter - Stainless Steel - 3/8" NPT Male to 5/8"-18 Inverted Flare Female

    In Stock

    $16.39
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Expander - Stainless Steel - 1/2"-20 Inverted Flare Male to 5/8"-18 Inverted Flare Female for 3/8" Tubing.

    In Stock

    $16.39
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Adapter - Stainless Steel - 1/8" NPT Male to 10mm x 1.0 Concave Flare Female.

    In Stock

    $11.91
  • Earl's Hardline Adapter
    Last Chance
    Earl's
    Earl's Hardline Adapter CLEARANCE ITEM / ALL SALES FINAL - Hardline Adapter - 90 Degree Stainless Steel - 1/8" NPT Male to 10mm x 1.0 Concave Flare Female.

    In Stock

    Advertised Price $1.95
    $1.35
    Save $0.60
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Adapter - Stainless Steel - 1/4" NPT Male to 1/2"-20 Inverted Flare Female

    In Stock

    $11.91
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Reducer - Stainless Steel - 9/16"-18 Inverted Flare Male to 3/8"-24 Inverted Flare Female for 3/16" Tubing

    Backordered

    Est. Ship Date: Coming Soon

    $13.40
  • Earl's Hardline Tube Nut
    Last Chance
    Earl's
    Earl's Hardline Tube Nut CLEARANCE ITEM / ALL SALES FINAL - Tube Nut - Stainless Steel - 1/2"-20 Inverted Flare for 5/16" Tubing - Sold Individually.

    In Stock

    Advertised Price $1.15
    $0.75
    Save $0.40
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Adapter - Stainless Steel - 1/4" NPT Male to 5/8"-18 Inverted Flare Female

    In Stock

    $16.39
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Reducer - Stainless Steel - 1/2"-20 Inverted Flare Male to 3/8"-24 Inverted Flare Female for 5/16" Tubing.

    In Stock

    $14.88
  • Earl's Hardline Tube Nut
    Last Chance
    Earl's
    Earl's Hardline Tube Nut CLEARANCE ITEM / ALL SALES FINAL - Tube Nut - Stainless Steel - 10mm x 1.0mm Concave Flare for 3/16" Tubing - Package of 5 pieces.

    In Stock

    Advertised Price $6.05
    $3.45
    Save $2.60
  • Earl's Hardline Tube Nut
    Earl's
    Earl's Hardline Tube Nut Tube Nut - Stainless Steel - 10mm x 1.0mm Inverted Flare for 3/16" Tubing - Package of 5 pieces.

    Backordered

    Est. Ship Date: 08/31/2026

    $20.89
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Reducer - Stainless Steel - 1/2"-20 Inverted Flare Male to 9/16"-18 Inverted Flare Female for 3/16" Tubing

    In Stock

    $16.39
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Adapter - Stainless Steel - 1/8" NPT Male to 10mm x 1.0 Inverted Flare Female.

    In Stock

    $11.91
  • Earl's Hardline Adapter
    Last Chance
    Earl's
    Earl's Hardline Adapter CLEARANCE ITEM / ALL SALES FINAL - Hardline Reducer - Stainless Steel - 10mm x 1.0 Inverted Flare Male to 12mm x 1.0 C.C Female for 1/4" Tubing

    In Stock

    Advertised Price $2.25
    $1.35
    Save $0.90
  • Earl's Hardline Tube Nut
    Clearance
    Earl's
    Earl's Hardline Tube Nut CLEARANCE ITEM / ALL SALES FINAL - Tube Nut - Stainless Steel - 7/16"-24 Inverted Flare for 1/4" Tubing - Sold Individually.

    In Stock

    Advertised Price $11.66
    $6.41
    Save $5.25
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Reducer - Stainless Steel - 9/16"-18 Inverted Flare Male to 1/2"-20 Inverted Flare Female for 3/16" Tubing.

    In Stock

    $16.39
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Reducer - Stainless Steel - 7/16"-24 Inverted Flare Male to 3/8"-24 Inverted Flare Female for 1/4" Tubing.

    In Stock

    $13.41
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Expander - Stainless Steel - 3/8"-24 Inverted Flare Male for 3/16" Tubing to 7/16"-24 Inverted Flare Female for 1/4" Tubing.

    In Stock

    $14.88
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Reducer - Stainless Steel - 5/8"-18 Inverted Flare Male to 1/2"-20 Inverted Flare Female for 5/16" Tubing.

    Backordered

    Est. Ship Date: 08/31/2026

    $16.39
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Expander - Stainless Steel - 3/8"-24 Inverted Flare Male to 10mm x 1.0 Inverted Flare Female for 3/16" Tubing.

    In Stock

    $14.88
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Adapter - Stainless Steel - 1/8" NPT Male to 7/16"-24 Inverted Flare Female

    In Stock

    $11.91
  • Earl's Hardline Adapter
    Earl's
    Earl's Hardline Adapter Hardline Adapter - 90 Degree Stainless Steel - 1/8" NPT Male to 3/8"-24 Inverted Flare Female.

    In Stock

    $14.88

Tube Nuts & Hardline Adapters

Tube sleeves and tube nuts are used to transition from hardline tubing to AN fittings & AN plumbing. These parts are used with a 37 degree flaring tool that is used to form the end of the tubing.