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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#12 O-Ring Boss Plug A1P81412
A-1 PRODUCTS
$8.89A reliable hydraulic system demands quality fittings that won't compromise your setup with leaks or failures. This #12 O-Ring Boss plug delivers a secure, leak-proof seal for 12 AN applications, backed by aluminum construction and precision engineering...AAA81412- SKU:
- AAA81412
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MFG Part #:
- A1P81412
$8.89 -
#10 O-Ring Boss Plug A1P81410
A-1 PRODUCTS
$7.62When you're building or maintaining a high-performance fuel system, hydraulic line, or pressurized application, you need fittings you can trust to hold without leaks. The #10 O-Ring Boss Plug delivers exactly that—a sealed, reliable endpoint for your AN...AAA81410- SKU:
- AAA81410
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- A1P81410
$7.62 -
#6 O-Ring Boss Plug A1P81406
A-1 PRODUCTS
$5.08Whether you're building a custom fuel system, sealing off unused AN ports, or assembling a precision hydraulic circuit, you need a plug that won't weep or fail under pressure. This #6 O-Ring Boss Plug delivers a reliable, leak-free seal with the...AAA81406- SKU:
- AAA81406
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- MFG Part #:
- A1P81406
$5.08 -
Allstar Performance Oil Pan Plug Magnetic 1/2-20 ALL87040
ALLSTAR PERFORMANCE
$11.99Protect your engine investment with this magnetic drain plug that captures ferrous metal particles before they circulate through your oil system. Regular inspection of collected debris gives you early warning of internal wear, helping you catch potential...ALL87040- SKU:
- ALL87040
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
$11.99 -
XRP `-6 ORB Internal Hex Port Plug - Aluminum - Black XRPIHP006
XRP-XTREME RACING PROD.
$9.99When you're running a high-performance fuel or coolant system, open ports are a liability—they invite contamination and fluid loss. The XRP -6 ORB Internal Hex Port Plug seals those ports with precision-engineered reliability, keeping your system clean...XRPIHP006- SKU:
- XRPIHP006
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- IHP006
$9.99 -
XRP #12 Flare Cap XRP992912
XRP-XTREME RACING PROD.
$9.99A quality flare cap is essential for protecting your fuel system or fluid lines from contamination and leakage during high-performance driving. The XRP #12 Flare Cap delivers reliable sealing with a precision-engineered aluminum design that resists...XRP992912- SKU:
- XRP992912
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MFG Part #:
- 992912
$9.99 -
XRP #8 Flare Cap XRP992908
XRP-XTREME RACING PROD.
$6.79Fluid line systems demand precision fittings that won't leak under pressure or corrode over time. The XRP #8 Flare Cap delivers both reliability and durability with a clean, anodized finish that resists oxidation in high-heat engine bays. Whether you're...XRP992908- SKU:
- XRP992908
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- 992908
$6.79 -
XRP #8 Flare Plug XRP980608
XRP-XTREME RACING PROD.
$4.69A quality flare plug is essential for maintaining system integrity in high-performance fuel, oil, and coolant lines where reliability cannot be compromised. XRP's hex head design ensures secure connections with standard wrenches, while the red anodized...XRP980608- SKU:
- XRP980608
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MFG Part #:
- 980608
$4.69 -
NPT Hex Plug 1/2 HF-97144BLK
TRIPLE X RACE COMPONENTS
$6.49If you're building a custom fuel system, coolant loop, or pneumatic setup, you need reliable fittings that won't leak under pressure. This NPT hex plug seals threaded ports cleanly and provides a secure, tamper-proof closure with a wrench-friendly hex...TXRHF-97144-BLK- SKU:
- TXRHF-97144-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- HF-97144BLK
$6.49Qty in Cart: 0Quantity:Price:$6.49Subtotal: -
NPT Allen Plug 3/8 HF-97033BLK
TRIPLE X RACE COMPONENTS
$5.09Port plugging solutions demand precision and durability under pressure—this NPT Allen Plug delivers both with a clean, dependable design. Whether you're sealing off unused hydraulic ports, fuel system fittings, or custom manifold work, a quality plug...TXRHF-97033-BLK- SKU:
- TXRHF-97033-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- HF-97033BLK
$5.09Qty in Cart: 0Quantity:Price:$5.09Subtotal: -
NPT Allen Plug 1/4 HF-97022BLK
TRIPLE X RACE COMPONENTS
$4.99Clean up loose ports and prevent contamination in your fuel, oil, and coolant systems with this precision NPT plug. The allen head design provides secure, tool-friendly installation without stripping or corrosion concerns. Black anodized aluminum...TXRHF-97022-BLK- SKU:
- TXRHF-97022-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- MFG Part #:
- HF-97022BLK
$4.99Qty in Cart: 0Quantity:Price:$4.99Subtotal: -
NPT Allen Plug 1/8 HF-97011BLK
TRIPLE X RACE COMPONENTS
$4.99Whether you're fine-tuning fuel lines, coolant circuits, or custom fluid systems, a quality NPT plug prevents leaks and contamination at critical junction points. This 1/8" Allen plug offers straightforward installation without special tools, making it...TXRHF-97011-BLK- SKU:
- TXRHF-97011-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MFG Part #:
- HF-97011BLK
$4.99Qty in Cart: 0Quantity:Price:$4.99Subtotal: -
NPT Allen Plug 1/16 HF-97001BLK
TRIPLE X RACE COMPONENTS
$4.99A reliable NPT plug is essential for sealing off unused ports on your fuel system, cooling lines, and custom fabrication projects—preventing leaks and contamination that can compromise performance. The Allen head design offers superior grip and...TXRHF-97001-BLK- SKU:
- TXRHF-97001-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MFG Part #:
- HF-97001BLK
$4.99Qty in Cart: 0Quantity:Price:$4.99Subtotal: -
#8 Plug HF-52008BLK
TRIPLE X RACE COMPONENTS
$4.99A quality AN fitting plug is essential for any pressurized fuel, coolant, or hydraulic system—it prevents fluid loss, contamination, and dangerous leaks at critical connection points. The #8 HF-52008BLK delivers the reliability and durability demanded by...TXRHF-52008-BLK- SKU:
- TXRHF-52008-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- MFG Part #:
- HF-52008BLK
$4.99Qty in Cart: 0Quantity:Price:$4.99Subtotal: -
#6 Plug HF-52006BLK
TRIPLE X RACE COMPONENTS
$3.49A quality hydraulic fitting is foundational to any high-performance fuel or fluid system—cheap plugs leak, fail under pressure, and compromise reliability when you need it most. The #6 Plug HF-52006BLK delivers the precision engineering and durability...TXRHF-52006-BLK- SKU:
- TXRHF-52006-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- MFG Part #:
- HF-52006BLK
$3.49Qty in Cart: 0Quantity:Price:$3.49Subtotal: -
#4 Plug HF-52004BLK
TRIPLE X RACE COMPONENTS
$3.29Fluid line leaks compromise performance and create safety hazards on the track or street. This #4 plug delivers a reliable, clean seal for your AN-fitting system without the bulk of traditional caps. Black anodized aluminum construction provides...TXRHF-52004-BLK- SKU:
- TXRHF-52004-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- MFG Part #:
- HF-52004BLK
$3.29Qty in Cart: 0Quantity:Price:$3.29Subtotal: -
#3 Plug HF-52003BLK
TRIPLE X RACE COMPONENTS
$3.29Clean up your hydraulic and fuel system lines with a reliable, corrosion-resistant fitting that won't let you down on track or in the shop. The #3 Plug HF-52003BLK delivers the durability and precision you need for a professional-grade installation,...TXRHF-52003-BLK- SKU:
- TXRHF-52003-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- MFG Part #:
- HF-52003BLK
$3.29Qty in Cart: 0Quantity:Price:$3.29Subtotal: -
#12 Cap HF-51012BLK
TRIPLE X RACE COMPONENTS
$9.19A properly sealed hydraulic or fuel system is critical to maintaining consistent pressure and preventing leaks under high-performance conditions. This #12 AN cap delivers reliable sealing with a lightweight aluminum construction that won't add...TXRHF-51012-BLK- SKU:
- TXRHF-51012-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- MFG Part #:
- HF-51012BLK
$9.19Qty in Cart: 0Quantity:Price:$9.19Subtotal: -
#10 Cap HF-51010BLK
TRIPLE X RACE COMPONENTS
$7.59A quality cap fitting is essential for any high-performance fuel or fluid system—it prevents contamination, maintains system integrity, and gives your setup a clean, finished appearance. The #10 Cap HF-51010BLK is a straightforward, reliable component...TXRHF-51010-BLK- SKU:
- TXRHF-51010-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- MFG Part #:
- HF-51010BLK
$7.59Qty in Cart: 0Quantity:Price:$7.59Subtotal: -
#8 Cap HF-51008BLK
TRIPLE X RACE COMPONENTS
$5.39A quality cap fitting is essential for securing AN hose lines and preventing fluid leakage in high-pressure fuel and coolant systems. This #8 AN cap delivers reliable sealing in demanding racing and performance applications where vibration and thermal...TXRHF-51008-BLK- SKU:
- TXRHF-51008-BLK
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- MFG Part #:
- HF-51008BLK
$5.39Qty in Cart: 0Quantity:Price:$5.39Subtotal:
