SM099 Unotch Nut with Plug Assembly Kit China Factory Suppliers

Source high-precision SM099 U-notch nut and M18x1.5 sealing plug kits from a leading China factory. Ideal for exhaust pipeline inspection and auto modification, these durable tools are provided by professional suppliers in carbon and stainless steel.

SupplierAnji Qiyi Home Technology Co., Ltd.www.qiyimetallic.com

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About this product

Product information from the supplier.

The SM099 U-notch Nut with Plug Assembly Kit is a professional-grade, all-in-one weld-on fitting solution specifically engineered for high-precision exhaust modification and diagnostic testing. This versatile kit combines a specialized U-notch oxygen sensor nut with a precision-matched threaded sealing plug, allowing technicians to seamlessly transition between active sensor monitoring and airtight system sealing during vehicle trial runs.

Designed to eliminate exhaust leakage during pipeline debugging and prototype development, the SM099 kit significantly boosts operational efficiency for modification shops and automotive laboratories. Whether you are performing a leak detection test or a temporary sensor removal, this assembly ensures a secure, vibration-resistant connection that maintains system integrity under extreme thermal cycling.

Detailed Parameters

Product Model	SM099 Assembly Kit	Thread Standard	M18 × 1.5 (Precision CNC)
Components	U-notch Nut & Sealing Plug	Material Options	Carbon Steel / Stainless Steel
Fitment	Universal (US, EU, JP Vehicles)	Installation Method	Weld-on Fitting
Primary Function	Exhaust Sealing & Sensor Mounting	Heat Resistance	High-Temperature Optimized
Application	Auto Modification & Testing	Inspection	100% Thread Matching Test

Key Advantages

Dual-Mode Versatility

Integrates mounting and sealing in one kit, allowing quick switching between sensor monitoring and airtight plugging.

Enhanced Efficiency

Eliminates the need for separate sealing accessories, streamlining workshop inventory and reducing downtime.

Anti-Seizure Design

The U-notch configuration prevents thread seizure even in high-temperature exhaust environments for easy disassembly.

Precision Engineering

CNC machined M18x1.5 threads ensure a tight, leak-proof fit during pressure tests and trial runs.

Material Flexibility

Available in cost-effective Carbon Steel for short-term tests or Stainless Steel for long-term corrosion resistance.

Universal Compatibility

Fully compatible with standard M18x1.5 requirements for American, European, and Japanese modified vehicles.

Product Gallery

Management Platforms

Bulk Supply Chain

Direct source factory capacity for high-volume wholesale to global distributors.

Custom Fabrication

Tailored material selection and surface treatments to meet specific OEM requirements.

Quality Inspection

Every SM099 kit undergoes a rigorous thread-matching check before final packaging.

Fast Logistics

Optimized shipping solutions for aftermarket modification stores and manufacturers.

Packaging Options

Adjustable packing solutions to ensure product protection during international transit.

Technical Support

Expert guidance on weld-on installation and material selection for different environments.

Investment Return Comparison

Feature	Standard Nut Only	SM099 Assembly Kit	Impact on ROI
Sealing Method	Manual Temporary Patch	Precision Threaded Plug	Lower Labor Cost
Setup Time	High (Search for Plugs)	Instant (All-in-one)	Increased Throughput
Leak Risk	Moderate/High	Minimal/Secure	Reduced Retesting
Part Management	Multiple SKU Tracking	Single Kit SKU	Simplified Inventory
Life Cycle	Standard	High (Stainless Option)	Lower Replacement Rate

Frequently Asked Questions

Q: What is the main advantage of the U-notch design over standard nuts?

The U-notch design specifically resists thread seizure in high-temperature exhaust environments, making it significantly easier to remove and reinstall sensors compared to traditional nuts.

Q: Which material should I choose for off-road vehicle modifications?

For off-road use, we strongly recommend the Stainless Steel version due to its superior anti-corrosion performance and durability in damp or muddy road conditions.

Q: Is the M18x1.5 thread compatible with most oxygen sensors?

Yes, the M18x1.5 is the global industrial standard for oxygen sensors across most American, European, and Japanese vehicles.

Q: Can this kit be used for exhaust pipeline pressure testing?

Absolutely. The matched sealing plug is specifically designed to block the threaded hole effectively, preventing exhaust blow-by during pressure and leak tests.

Q: Do you offer wholesale pricing for modification shops?

Yes, as a direct source factory, we provide competitive bulk pricing and custom packing solutions for modification stores and aftermarket distributors.

Q: How is the SM099 kit installed on the exhaust pipe?

The U-notch nut is designed as a weld-on fitting. It should be securely welded onto the exhaust pipe, manifold, or catalytic converter to withstand thermal vibration.