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!
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- Qty in Cart
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- Price
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Rear End Quick Change Fitting for Filler Tank – Aluminum, Black
J J MOTORSPORTS
$22.95If you're running a quick-change rear end with a filler tank system, you need a fitting that handles both function and durability without compromise. This aluminum rear-end quick change fitting replaces your inspection plug with a dedicated -20 AN to -10...RCCH-008- SKU:
- RCCH-008
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$22.95 -
Allstar Performance Plastic Plug Kit ALL50810
ALLSTAR PERFORMANCE
$10.59Protect your AN fittings from contamination during storage, transport, and assembly with this essential Allstar Performance plug kit. Dust and debris in your fuel, oil, or brake lines will compromise system integrity and create costly headaches down the...ALL50810- SKU:
- ALL50810
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
$10.59 -
Allstar Performance Plastic Cap Kit ALL50800
ALLSTAR PERFORMANCE
$9.79Keep your AN fittings protected from contamination and debris with the Allstar Performance Plastic Cap Kit. These lightweight dust caps prevent moisture and dirt intrusion into your fuel system, cooling lines, or brake circuits—critical for maintaining...ALL50800- SKU:
- ALL50800
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
$9.79 -
XRP #12 Flare Cap Black XRP992912BB
XRP-XTREME RACING PROD.
$10.49Protect your high-pressure fuel and fluid lines from contamination and leaks with the XRP #12 Flare Cap. Whether you're running a competition fuel system or upgrading your street machine, a quality cap prevents dirt, moisture, and debris from entering...XRP992912BB- SKU:
- XRP992912BB
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$10.49 -
XRP #10 Flare Cap Black XRP992910BB
XRP-XTREME RACING PROD.
$7.99A properly sealed hydraulic or fuel system is critical to maintaining pressure integrity and preventing leaks under racing conditions. XRP's flare cap fittings are engineered for reliability in high-performance applications where system failure isn't an...XRP992910BB- SKU:
- XRP992910BB
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
$7.99 -
XRP #8 Flare Cap Black XRP992908BB
XRP-XTREME RACING PROD.
$6.79A properly sealed AN fitting system is fundamental to maintaining system integrity under high-pressure conditions, and this XRP flare cap delivers the reliability you need when precision matters. Whether you're running fuel, coolant, or brake lines in a...XRP992908BB- SKU:
- XRP992908BB
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
$6.79 -
XRP #6 Flare Cap Black XRP992906BB
XRP-XTREME RACING PROD.
$5.89Properly sealed hydraulic and fuel lines are non-negotiable in high-performance racing applications—leaks compromise both safety and consistency. The XRP #6 Flare Cap provides a reliable, clean termination point for -6 AN fittings, protecting your system...XRP992906BB- SKU:
- XRP992906BB
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$5.89 -
XRP #4 Flare Cap Black XRP992904BB
XRP-XTREME RACING PROD.
$3.99Protect your high-pressure fluid lines with a precision-engineered cap that won't let you down on the track or in the shop. XRP's black anodized aluminum construction resists corrosion while maintaining a clean, professional appearance in your engine bay...XRP992904BB- SKU:
- XRP992904BB
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
$3.99 -
XRP #3 Flare Cap Black XRP992903BB
XRP-XTREME RACING PROD.
$3.49A properly sealed hydraulic system is critical to maintaining consistent brake pressure and preventing fluid loss under high-performance conditions. This XRP #3 flare cap provides a reliable, precision-engineered seal for your -3 AN fittings, ensuring...XRP992903BB- SKU:
- XRP992903BB
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$3.49 -
1/2in NPT Magnetic Drain Plug 9064
TRANS-DAPT
$6.49Metal shavings and debris circulating through your engine oil accelerate wear and reduce component lifespan. A magnetic drain plug captures ferrous particles before they cause damage, giving you early warning signs of internal wear while extending drain...TRA9064- SKU:
- TRA9064
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
$6.49 -
Fragola 1in MPT Pipe Plug w/ Internal Allen 493207-BL
FRAGOLA
$7.49Fragola's 1in MPT pipe plug with internal Allen head provides a clean, secure closure for 1 NPT ports on fuel systems, coolant lines, and pneumatic applications. The black anodized aluminum construction resists corrosion while maintaining a professional...FRG493207-BL- SKU:
- FRG493207-BL
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$7.49 -
Fragola #3 Port Plug 3/8-24 Black 481403-BL
FRAGOLA
$3.99A quality port plug is essential for sealing unused fittings in your fuel system or cooling lines—preventing contamination, fluid loss, and air leaks that compromise performance. Fragola's black anodized aluminum construction resists corrosion while...FRG481403-BL- SKU:
- FRG481403-BL
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$3.99 -
Fragola #4 Port Plug w/ Socket Hex 481304-BL
FRAGOLA
$9.99Whether you're assembling a custom fuel system, hydraulic line setup, or high-pressure air circuit, you need fittings that won't fail under extreme conditions. The Fragola #4 Port Plug delivers precision engineering with a secure Allen head design that...FRG481304-BL- SKU:
- FRG481304-BL
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$9.99 -
Allstar Performance Aluminum Plug Kit ALL50830
ALLSTAR PERFORMANCE
$25.99Fluid system integrity depends on keeping contaminants out of your AN fittings, and this Allstar Performance aluminum plug kit provides a reliable, reusable solution for capped ports. Whether you're running a race engine, a custom fuel system, or a...ALL50830- SKU:
- ALL50830
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
$25.99 -
Allstar Performance Aluminum Cap Kit ALL50820
ALLSTAR PERFORMANCE
$19.99A quality cap kit is essential for protecting your AN fittings from contamination and maintaining system integrity under demanding track conditions. These Allstar Performance aluminum caps provide reliable sealing for unused ports, preventing debris...ALL50820- SKU:
- ALL50820
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
$19.99 -
Allstar Performance Hex Plug NPT 1/2in ALL49822
ALLSTAR PERFORMANCE
$6.99A quality hex plug is essential for sealing NPT port openings in fuel systems, oil lines, and cooling circuits—preventing leaks and contamination that compromise performance and reliability. This Allstar Performance plug delivers the durability and...ALL49822- SKU:
- ALL49822
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$6.99 -
Allstar Performance Hex Plug NPT 3/8in ALL49821
ALLSTAR PERFORMANCE
$5.69A quality NPT plug is essential for sealing off unused ports and preventing fluid leakage in your fuel, coolant, and oil systems. This Allstar Performance hex plug delivers reliable sealing with a design that's easy to install and remove for future...ALL49821- SKU:
- ALL49821
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$5.69 -
Allstar Performance Hex Plug NPT 1/8in ALL49820
ALLSTAR PERFORMANCE
$3.69Proper fluid system sealing is non-negotiable in high-performance racing applications. This Allstar hex plug provides a reliable, corrosion-resistant solution for blocking off unused 1/8" NPT ports on your engine block, fuel system, or cooling circuit...ALL49820- SKU:
- ALL49820
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
$3.69 -
Allstar Performance Allen Plug NPT 1/2in Steel ALL49814
ALLSTAR PERFORMANCE
$2.79NPT threaded ports are essential access points for fluid systems, sensors, and gauges in high-performance engines and custom builds. This Allstar Performance plug delivers a reliable, secure seal with its steel construction and hex-head design,...ALL49814- SKU:
- ALL49814
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
$2.79 -
Allstar Performance Allen Plugs NPT 3/8in Steel 2pk ALL49813
ALLSTAR PERFORMANCE
$2.79Allstar Performance Allen Head plugs deliver reliable, corrosion-resistant sealing for critical fluid passages in your engine bay. The zinc oxide coating ensures long-term durability in harsh racing environments, while the 3/8" NPT thread standard...ALL49813- SKU:
- ALL49813
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
$2.79
