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AN & NPT Fittings & Adapters, Fuel Line Fittings, Hose Couplers & more

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AN & NPT Fittings & Adapters, Fuel Line Fittings, Hose Couplers & more

No matter what you’re plumbing—brakes, fuel, vacuum, oil, nitrous—you can plumb it with help from Summit Racing Equipment! You can find all of the...

No matter what you’re plumbing—brakes, fuel, vacuum, oil, nitrous—you can plumb it with help from Summit Racing Equipment! You can find all of the automotive fittings you need right here, including a wide range of AN, NPT, fuel line and hose fittings, along with adapters and reducers to go from one to another, and so much more. Our huge selection means you can assemble the complex custom plumbing system your competition vehicle needs, restore your classic car with period-accurate components, or just keep your daily driver running right. Take a look at our options for AN Hoses, to go along with your fittings.

No matter what you’re plumbing—brakes, fuel, vacuum, oil, nitrous—you can plumb it with help from Summit Racing Equipment! You can find all of the automotive fittings you need right here, including a wide range of AN, NPT, fuel line and hose fittings, along with adapters and reducers to go from one to another, and so much more. Our huge selection means you can assemble the complex custom plumbing system your competition vehicle needs, restore your classic car with period-accurate components, or just keep your daily driver running right. Take a look at our options for AN Hoses, to go along with your fittings.

Top Brands


Starting now, you can shop from all the best brands of automotive fittings on the market, including Russell, Earl’s, Aeroquip, and Fragola, plus our dependable and budget-friendly Summit Racing brand.

Individual Parts

Results 1 - 25 of 85

Fitting and Adapter, Water Temperature Sensor Hose Adapter, Straight, Aluminum, Black, 1 1/2 in. Hose Barb, 1/4 in. NPT Gauge Port Size, Each

Part Number: RAD-TS38

Not Yet Reviewed

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Water Temperature Sensor Adapter, 38mm, Aluminum, Black Anodized, 1/8 in. NPT Bung, Each

Part Number: MIO-MMWHS-38-BK

4.42 out of 5 stars ( 12 )

Estimated Ship Date: Tomorrow

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Temperature Sensor Fitting, Adapter, Straight, Brass, Natural, 1/2 in. NPT Male, 3/8 in. Female, Each

Part Number: RFW-AD12

3.5 out of 5 stars ( 2 )

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Gauge Adapter, SMi, Pressure Sensor Extension, Natural, Each

Part Number: LNG-43525

5.0 out of 5 stars ( 1 )

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Water Temperature Sensor Adapter, 32mm, Aluminum, Black Anodized, 1/8 in. NPT Bung, Each

Part Number: MIO-MMWHS-32-BK

4.63 out of 5 stars ( 8 )

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Radiator Hose Adapter, Nylon, Black, Compatible with 1.250 in to 1.575 in. hose, Kit

Part Number: DCW-DC-0409

4.55 out of 5 stars ( 11 )

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Fittings, O2 Sensor Adapters, Metric To Metric, Straight, Steel, Natural, M18 x 1.5 Male Threads, M12 x 1.25 Female Threads, Pair

Part Number: HDD-820-0082

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Water Temperature Sensor Adapter, 30mm, Aluminum, Black Anodized, 1/8 in. NPT Bung, Each

Part Number: MIO-MMWHS-30-BK

3.0 out of 5 stars ( 1 )

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Water Temperature Sensor Adapter, 28mm, Aluminum, Black Anodized, 1/8 in. NPT Bung, Each

Part Number: MIO-MMWHS-28-BK

5.0 out of 5 stars ( 1 )

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Water Temperature Sensor Adapter, 34mm, Aluminum, Black Anodized, 1/8 in. NPT Bung, Each

Part Number: MIO-MMWHS-34-BK

3.83 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

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Inline oil sensor adapter, compact, two 1/8" NPT sensor ports, -10AN ORB in/out ports

Part Number: IRP-ENV-151

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Hose Adapter 1.25" to 1.5" w/ 1/4" NPT Port

Part Number: RAD-TS32-38

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Gauge Adapters, Dual Inline Oil Sensor Manifold Blocks, Straight, Aluminum, Black, -10 AN O-ring, -10 AN O-ring, 1/8 in. NPT, Female Threads, Each

Part Number: IRP-ENV-150

3.67 out of 5 stars ( 3 )

Estimated Ship Date: Tomorrow

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Temperature Sensor Fitting, Adapter, Straight, Aluminum, Black, 3/8 in. BSPT Male, 1/8 in. NPT Female, Each

Part Number: HYB-HYBCTA0105

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BRASS BUSHING, 1/2"MPT X 3/8"FPT

Part Number: FST-30278-1

5.0 out of 5 stars ( 1 )

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1.25" Hose Adapter w/ 1/4" NPT Port

Part Number: RAD-TS32

4.5 out of 5 stars ( 2 )

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Fitting, Pressure Gauge, Straight, Male -6 AN to Male -6 AN, 1/8 in. NPT Female, Aluminum, Black Anodized, Each

Part Number: AEI-65608

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Fitting, Pressure Gauge, Straight, Male -8 AN to Male -8 AN, 1/8 in. NPT Female, Aluminum, Black Anodized, Each

Part Number: AEI-65609

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Coolant Temperature Sensor Adapter, Adapts 3/8 in. NPT Sensors to GM LS and LT Gen III/IV/V 28mm Engine Block Coolant Ports, Billet Aluminum, Each

Part Number: ICB-551782-375

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Tomorrow

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Gauge Adapters, Straight Fitting, Billet Aluminum, Natural, 16mm x 1.5 Female Threads, Oil Pressure Sensor Relocation, GM, LS Series V8 Engines, Each

Part Number: ICB-551534

4.8 out of 5 stars ( 10 )

Estimated Ship Date: Tomorrow

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Temperature Sender Fitting, Radiator, Inline, 1 1/2 in. Hose Diameter, 1/2 in. Sensor Hole, Each

Part Number: ADD-716674

4.67 out of 5 stars ( 6 )

Estimated Ship Date: Tomorrow

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1/8" NPT Male to M16-1.5 Female Oil Pressure Sensor Adapter Fitting

Part Number: ICB-F125NPFM1615

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LT Master Oil & Coolant Sensor Adapter Set 1/8 3/8 1/2 NPT

Part Number: ICB-551186-LT

Not Yet Reviewed

Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today

Extended Length LS 1/8" NPT Coolant Temperature Sensor Adapter Engine Swap M12-1.5

Part Number: ICB-551159L

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Estimated Ship Date: May 4, 2026 if ordered today

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Estimated Ship Date: May 4, 2026 if ordered today