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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 26

Fitting, Bung, Screw-in Type, #12 Male, Steel, Natural Finish, with Hex Nut, for Vacuum Pump, Each

Part Number: SBR-S0093

Not Yet Reviewed

Estimated Ship Date: Apr 22, 2026 if ordered today

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Estimated Ship Date: Apr 22, 2026 if ordered today

Temp Adapter, 3/8 NPT, Long Style, Aluminum, Black, Each

Part Number: QCR-611-903

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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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 )

Estimated Ship Date: Today

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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: Today

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Adapter, Tube, 1.50 in. O.D., 6 in. Long, 0.080 in. Wall, 0.375 in. Bung, No.10-32 Threaded Ground Lug, Aluminum, Each

Part Number: BCI-72065

4.67 out of 5 stars ( 3 )

Estimated Ship Date: Today

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Coolant Tube Drain, Aluminum, 1.25 in. Diameter, Threaded Bung, Each

Part Number: BCI-72102

4.14 out of 5 stars ( 7 )

Estimated Ship Date: Today

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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 )

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3/8" NPT Steel Weld-On Bung

Part Number: NXO-6058109ST38

Not Yet Reviewed

Estimated Ship Date: Apr 23, 2026 if ordered today

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Estimated Ship Date: Apr 23, 2026 if ordered today

S/STEEL M14 x 1.5 WELD BUNG O2 SENSOR

Part Number: SFL-SF989M14SS

Not Yet Reviewed

Estimated Ship Date: Apr 30, 2026 if ordered today

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Estimated Ship Date: Apr 30, 2026 if ordered today

RADIATOR FITTING, STRAIGHT, -20 AN O-Ring Male to 1.50 in. Hose, Aluminum, Silver Anodized, incl raw bung, Each

Part Number: PQX-5292323

Not Yet Reviewed

Estimated Ship Date: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 if ordered today

RADIATOR FITTING, STRAIGHT, -20 AN O-Ring Male to 1.50 in. Hose, Aluminum, Black Anodized, incl raw bung, Each

Part Number: PQX-5292327

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Estimated Ship Date: Jun 12, 2026 if ordered today

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Estimated Ship Date: Jun 12, 2026 if ordered today

M10 x 1.0 FEMALE WELD BUNG - ALUMINUM

Part Number: SFL-SF990M101D

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Estimated Ship Date: Apr 30, 2026 if ordered today

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Estimated Ship Date: Apr 30, 2026 if ordered today

RADIATOR FITTING, STRAIGHT, -20 AN O-Ring Male to 1.75 in. Hose, Aluminum, Silver Anodized, incl raw bung, Each

Part Number: PQX-5292333

Not Yet Reviewed

Estimated Ship Date: Jun 12, 2026 if ordered today

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Estimated Ship Date: Jun 12, 2026 if ordered today

RADIATOR FITTING, ADAPTER, Union, Straight, -20AN O-Ring Male to -20AN Male, Aluminum, incl raw bung, Blue Anodized, Each

Part Number: PQX-5292410

Not Yet Reviewed

Estimated Ship Date: Jun 11, 2026 if ordered today

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Estimated Ship Date: Jun 11, 2026 if ordered today

1/8_BSPT FEMALE WELD BUNG - ALUMINUM

Part Number: SFL-SF99702BSPP

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Estimated Ship Date: Apr 30, 2026 if ordered today

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Estimated Ship Date: Apr 30, 2026 if ordered today

ALUMINIUM M18 x 1.5 WELD BUNG O2 SENSOR

Part Number: SFL-SF-989-M18-D

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Estimated Ship Date: Apr 30, 2026 if ordered today

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Estimated Ship Date: Apr 30, 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: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

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: Apr 24, 2026 if ordered today

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Estimated Ship Date: Apr 24, 2026 if ordered today

RADIATOR FITTING, STRAIGHT, -20 AN O-Ring Male to 1.75 in. Hose, Aluminum, Black Anodized, incl raw bung, Each

Part Number: PQX-5292337

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STEEL M14 x 1.5 WELD BUNG O2 SENSOR

Part Number: SFL-SF-989-M14-S

Not Yet Reviewed

Estimated Ship Date: Apr 30, 2026 if ordered today

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Estimated Ship Date: Apr 30, 2026 if ordered today

1/16_NPT FEMALE WELD BUNG - ALUMINUM

Part Number: SFL-SF-997-01-D

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Estimated Ship Date: Apr 30, 2026 if ordered today

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Estimated Ship Date: Apr 30, 2026 if ordered today

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

Part Number: RAD-TS32

4.5 out of 5 stars ( 2 )

Estimated Ship Date: Today

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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

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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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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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