Summit Racing SpeedCard - learn how to get 15% back up to $150

Summit Racing SpeedCard - learn how to get 15% back up to $150

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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 79

Fuel Rail Fitting, Aluminum, Black Anodized, 3/8 in. Male Spring Lock to -6 AN Male Threads, Each

Part Number: SUM-221330B

5.0 out of 5 stars ( 5 )

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Fitting, Adapter, Fuel Rail Type, Straight, Billet Aluminum, Black, 12mm Male Spring Lock, -6 AN Male Thread

Part Number: AEI-15123

5.0 out of 5 stars ( 2 )

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Fuel Rail Fitting, Steel, Stainless, -6 AN Male to 3/8 in Female Spring Lock, Each

Part Number: AEI-15101

4.0 out of 5 stars ( 6 )

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Fitting, Adapter, Fuel Rail Type, Straight, Billet Aluminum, Black, 14mm Male Spring Lock, -6 AN Male Thread

Part Number: AEI-15124

5.0 out of 5 stars ( 1 )

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Fitting, Adapter, Fuel Rail Type, Straight, Billet Aluminum, Black, 14mm Male Spring Lock, -8 AN Male Thread

Part Number: AEI-15125

5.0 out of 5 stars ( 1 )

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Fitting, EFI Adapter, Straight, Male -8 AN to 3/8 in. Female Spring Lock, Aluminum, Black Anodized, Each

Part Number: FRA-491992-BL

5.0 out of 5 stars ( 2 )

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Fitting, EFI Adapter, Straight, Male -6 AN to 5/16 in. Female Spring Lock, Aluminum, Black Anodized, Each

Part Number: FRA-491990-BL

5.0 out of 5 stars ( 2 )

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Fuel Rail Fitting, Aluminum, Black Anodized, 1/2 in. Male Spring Lock to -8 AN ORB Male Threads, Each

Part Number: HSE-812-08-08-2

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Fuel Rail Fitting, Aluminum, Black Anodized, 3/8 in. Male Spring Lock to -6 AN Male Threads, Each

Part Number: HSE-811-06-06-2

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Fuel Rail Fitting, Aluminum, Black Anodized, 1/2 in. Male Spring Lock to -8 AN Male Threads, Each

Part Number: HSE-811-08-08-2

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Fitting, Adapter, Hose Barb to Spring Lock, 90 Degree, Plastic, Black, 5/16 in., 5/16 in., Each

Part Number: URR-KP135

2.0 out of 5 stars ( 2 )

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Fuel Rail Fitting, Aluminum, Blue Anodized, 5/16 in. Female Spring Lock to -6 AN Male Threads, Each

Part Number: SUM-221340

5.0 out of 5 stars ( 1 )

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Fuel Line Adapter Fitting, Straight, 5/16 in. Line, Female Spring Lock to Nylon, Steel, Zinc, Each

Part Number: URR-K320

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Today

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Fuel Rail Fitting, Steel, Stainless, -8 AN Male to 1/2 in. Female Spring Lock, Each

Part Number: AEI-15102

3.2 out of 5 stars ( 5 )

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Nitrous Outlet 6AN x 3/8" Spring Lock Fuel Adapter - Male/Male

Part Number: NXO-60-60022

Not Yet Reviewed

Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Fuel Rail Fitting, Aluminum, Clear Anodized, 5/16 in. Male Spring Lock to -6 AN Male Threads, Each

Part Number: SUM-221331C

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Fuel Rail Fitting, Aluminum, Nickel Plated, 5/16 in. Female Spring Lock to -6 AN Male Threads, Each

Part Number: SUM-221340N

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Fuel Rail Fitting, Aluminum, Nickel Plated, 5/16 in. Male Spring Lock to -6 AN Male Threads, Each

Part Number: SUM-221331N

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Fuel Rail Fitting, Aluminum, Clear Anodized, 1/2 in. Male Spring Lock to -8 AN ORB Male Threads, Each

Part Number: HSE-812-08-08-5

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Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Fuel Rail Fitting, Aluminum, Black Anodized, 5/16 in. Male Spring Lock to 3/8 in. NPT Male Threads, Each

Part Number: HSE-813-06-05-2

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Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Fuel Rail Fitting, Aluminum, Blue Anodized, 3/8 in. Male Spring Lock to 3/8 in. NPT Male Threads, Each

Part Number: HSE-813-06-06-1

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Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

Fuel Rail Fitting, Aluminum, Blue Anodized, 5/16 in. Male Spring Lock to -6 AN Male Threads, Each

Part Number: HSE-811-06-05-1

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1963-1974 Chevrolet Corvette Gas Neck Overflow Hose Support Spring.

Part Number: MMU-28412

Not Yet Reviewed

Estimated Ship Date: Feb 23, 2026 if ordered today

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Estimated Ship Date: Feb 23, 2026 if ordered today

6AN x 5/16" Spring Lock Fuel Adapter - Male/Female

Part Number: NXO-60-60030

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Estimated Ship Date: Jan 26, 2026 if ordered today

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Estimated Ship Date: Jan 26, 2026 if ordered today

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