Cap and Plug Fittings
Circle Track Cap and Plug Fittings at JJ Motorsports
Cap and plug fittings are essential when sealing lines or unused ports to prevent leaks and maintain pressure. These durable plugs safeguard your fluid systems during storage or between races. Integrate them with other high-quality fluid line components for a dependable racing setup.
Shop trusted brands like Allstar Performance for plastic kits and Fragola for high-flow options. Explore related categories such as Circle Track Fittings and Plugs for complete fluid system solutions or Circle Track Hoses for matching lines.
Top Circle Track Cap and Plug Fittings
- Rear End Quick Change Fitting for Filler Tank – Aluminum, Black – Upgrade your quick change rear end setup with this fitting, designed for seamless connection to a filler tank. Made from lightweight aluminum and anodized in black, this fitting replaces the side bell inspection plug.
- Allstar Performance Plastic Plug Kit ALL50810 – AN Dust Plug 3 AN-16 AN Plastic Red Kit.
- Allstar Performance Plastic Cap Kit ALL50800 – AN Dust Cap 3 AN-16 AN Plastic Red Kit.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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#6 Cap HF-51006BLK
TRIPLE X RACE COMPONENTS
$4.09A properly sealed AN fitting is critical for maintaining system integrity in high-pressure fuel, oil, and coolant lines—any leak compromises performance and reliability. This #6 cap delivers the...TXRHF-51006-BLK- SKU:
- TXRHF-51006-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- HF-51006BLK
$4.09Qty in Cart: 0Quantity:Price:$4.09Subtotal: -
#4 Cap HF-51004BLK
TRIPLE X RACE COMPONENTS
$4.09A quality cap fitting is essential for any pressurized fuel or fluid system—it seals off open AN ports to prevent contamination, fluid loss, and potential safety hazards during operation or storage...TXRHF-51004-BLK- SKU:
- TXRHF-51004-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.27 LBS
- MFG Part #:
- HF-51004BLK
$4.09Qty in Cart: 0Quantity:Price:$4.09Subtotal: -
#3 Cap HF-51003BLK
TRIPLE X RACE COMPONENTS
$4.09Fluid line systems demand precision fittings to eliminate leaks and maintain system integrity under high pressure. The #3 Cap HF-51003BLK is a purpose-built AN fitting designed to seal off 3 AN ports...TXRHF-51003-BLK- SKU:
- TXRHF-51003-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- HF-51003BLK
$4.09Qty in Cart: 0Quantity:Price:$4.09Subtotal: -
1/4 NPT Pipe Plug Allen Socket Black 662043
RUSSELL
$6.95Clean up your engine bay and transmission lines with these precision-engineered pipe plugs that deliver a professional appearance while sealing off unused 1/4 NPT ports. Whether you're running a...RUS662043- SKU:
- RUS662043
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- 662043
$6.95 -
Fragola 1/2 MPT Hex Pipe Plug 493304
FRAGOLA
$5.99When you're building a high-performance fuel system or custom cooling circuit, you need fittings you can trust to seal tight and hold pressure without adding unnecessary weight. The Fragola 1/2 MPT...FRG493304- SKU:
- FRG493304
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- MFG Part #:
- 493304
$5.99 -
Fragola #4 Flare Cap 492904
FRAGOLA
$3.49A proper flare cap is essential for securing your fuel, oil, or coolant lines while maintaining system integrity under high pressure and vibration. The Fragola #4 Flare Cap delivers reliable sealing...FRG492904- SKU:
- FRG492904
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- 492904
$3.49 -
Fragola #3 Flare Cap 492903
FRAGOLA
$3.49A quality flare cap is essential for securing hydraulic lines, fuel systems, and brake applications in high-performance builds where vibration and heat can compromise inferior fittings. The Fragola...FRG492903- SKU:
- FRG492903
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MFG Part #:
- 492903
$3.49 -
Aeroquip #12 O-Ring Boss Plug FCM3727
AEROQUIP
$22.99Keep your hydraulic and fluid systems sealed tight with the Aeroquip #12 O-Ring Boss Plug — a must-have for any serious builder or racer looking for a reliable, leak-free solution. Machined from...AERFCM3727- SKU:
- AERFCM3727
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- MFG Part #:
- FCM3727
$22.99 -
Aeroquip #3 Alm Flare Plug FCM3712
AEROQUIP
$4.09Keep your AN fittings sealed and protected with the Aeroquip FCM3712 Aluminum Flare Plug — a must-have for any serious build or race application. Engineered for a secure, leak-free seal, this...AERFCM3712- SKU:
- AERFCM3712
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- FCM3712
$4.09 -
Aeroquip #4 Steel Flare Plug FCM3702
AEROQUIP
$5.99Keep your hydraulic and fuel lines sealed tight with the Aeroquip #4 Steel Flare Plug FCM3702 — a reliable, no-nonsense solution built for performance applications. Whether you're capping off an...AERFCM3702- SKU:
- AERFCM3702
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- FCM3702
$5.99Qty in Cart: 0Quantity:Price:$5.99Subtotal: -
Aeroquip #3 Steel Flare Plug FCM3701
AEROQUIP
$13.99Keep your fuel, oil, or brake lines sealed tight with the Aeroquip #3 Steel Flare Plug FCM3701 — a trusted solution for capping off unused AN fittings cleanly and securely. Built from durable steel...AERFCM3701- SKU:
- AERFCM3701
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- FCM3701
$13.99Qty in Cart: 0Quantity:Price:$13.99Subtotal: -
Aeroquip #3 Steel Cap FCM3479
AEROQUIP
$24.99Keep your AN fittings protected and your build looking clean with the Aeroquip #3 Steel Cap FCM3479. These heavy-duty caps are a must-have for any serious performance build, sealing off unused ports...AERFCM3479- SKU:
- AERFCM3479
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- FCM3479
$24.99 -
Aeroquip `-16 Aluminum Dust Plug 10pk FBM3660
AEROQUIP
$20.99Keep your -16 AN fittings protected from contamination and debris with these aluminum dust plugs. Whether you're running a high-performance fuel system, hydraulic lines, or pneumatic circuits,...AERFBM3660- SKU:
- AERFBM3660
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MFG Part #:
- FBM3660
$20.99 -
Aeroquip `-12 Aluminum Dust Plug 10pk FBM3659
AEROQUIP
$12.99Keeping your high-pressure fluid lines clean and protected is non-negotiable in performance racing. These Aeroquip aluminum dust plugs seal -12 AN ports with precision-engineered reliability,...AERFBM3659- SKU:
- AERFBM3659
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MFG Part #:
- FBM3659
$12.99 -
Aeroquip `-6 Aluminum Dust Plug 20pk FBM3656
AEROQUIP
$8.99Protect your AN fittings from contamination and corrosion with these precision-machined aluminum dust plugs. Whether you're building a custom fuel system, brake line setup, or hydraulic circuit,...AERFBM3656- SKU:
- AERFBM3656
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- FBM3656
$8.99 -
Aeroquip `-4 Aluminum Dust Plug 20pk FBM3655
AEROQUIP
$13.99Protecting your AN line connections from dirt, moisture, and contamination is critical for maintaining system integrity and preventing costly repairs down the line. These Aeroquip aluminum dust plugs...AERFBM3655- SKU:
- AERFBM3655
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- FBM3655
$13.99 -
Aeroquip `-16 Aluminum Dust Cap 10pk FBM3653
AEROQUIP
$7.89Protecting your high-pressure AN fittings from contamination is essential for maintaining system reliability and preventing costly downtime. These aluminum dust caps seal off -16 AN ports when lines...AERFBM3653- SKU:
- AERFBM3653
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MFG Part #:
- FBM3653
$7.89Qty in Cart: 0Quantity:Price:$7.89Subtotal: -
#8 O-Ring Boss Plug A1P81408
A-1 PRODUCTS
$6.35If you're running AN fittings in your fuel system, cooling loop, or hydraulic setup, you need a reliable plug to cap off unused ports—and this #8 O-Ring Boss Plug delivers the dependable seal that...AAA81408- SKU:
- AAA81408
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- A1P81408
$6.35
