ARP TLX-ARP400-8607-CL360A70 Nut Steel Hex Kit 661317386876 1/2IN-20

( Brand: Arp ), ( Manufacturer Part Number: TLX-ARP400-8607-CL360A70 ), ( Type: Automotive ), ( Features: Easy Installation ), ( Item Height: 0.750 ), ( Item Length: 0.250 ), ( Item Weight: 0.2500 ), ( Fitment Type: Direct Replacement ), ( Generic Keywords 1: See Notes ), ( Intended Use: Automobiles ), ( Manufacturer Warranty: 1 Year ), ( UPC: 661317386876 )

Review ARP Nut Kit 1/2in-20 Stainless Steel Hex

The **ARP TLX-ARP400-8607-CL360A70 Nut Kit (1/2" 20 Steel Hex)** is a high-performance, precision-engineered fastening solution designed for demanding industrial, mechanical, and structural applications where reliability, durability, and ease of installation are critical. This kit features a robust collection of **1/2-inch (12.7 mm) nominal diameter, 20 threads-per-inch (TPI) hex nuts**, crafted from **high-strength, cold-drawn steel** to ensure exceptional tensile strength, resistance to wear, and long-term performance under heavy loads. The nuts are manufactured to strict tolerances, guaranteeing a snug, consistent fit with matching **1/2" 20 bolts or studs**, minimizing the risk of loosening or misalignment in critical assemblies. Their **hexagonal design** provides ample wrenching surface area, allowing for secure and efficient tightening with standard or impact tools, while the **clean, sharp edges** of the hex head prevent rounding or damage during repeated use. The steel composition is treated to resist corrosion and abrasion, making these nuts ideal for outdoor, marine, or high-moisture environments where rust and degradation could compromise structural integrity. Whether used in heavy machinery, automotive suspensions, industrial frameworks, or construction projects, this nut kit delivers the strength and precision required to maintain tight, secure connections under constant stress. The **CL360A70 designation** suggests a specific coating or finish likely a protective layer such as zinc, cadmium, or another corrosion-resistant treatment to further extend the nuts lifespan in harsh conditions. Packaged thoughtfully for easy access and organization, this kit is a practical choice for professionals who demand nothing less than premium-quality fasteners for their most demanding applications.

### **Pros and Cons of buying a ARP TLX-ARP400-8607-CL360A70 Nut Kit (1/2" 20 Steel Hex)**

1. **High-Quality Materials** The kit uses **steel hex nuts**, which are durable, corrosion-resistant, and suitable for heavy-duty applications. The steel construction ensures longevity, especially in mechanical or automotive setups where wear and tear are common.

2. **Standardized Threading** The **1/2" 20 thread size** is a widely recognized standard, making these nuts compatible with most bolts, studs, and fittings in the market. This reduces the need for custom or specialty parts.

3. **Precision Manufacturing** ARP (Advanced Racing Products) is known for **tight tolerances and consistent quality**, which minimizes the risk of stripped threads or misalignment in critical applications (e.g., engine mounts, suspension components).

- Engine mounts

- Suspension components

- Brake systems

- Heavy machinery attachments

- Custom fabrication projects

5. **Corrosion Resistance (Relative to Standard Nuts)** While not as high as stainless steel, **black oxide or zinc-plated steel nuts** offer better resistance to rust than plain carbon steel, extending their service life in exposed environments.

6. **Easy Installation & Removal** The **hex shape** allows for straightforward installation with standard wrenches or sockets, reducing the need for specialized tools.

7. **Cost-Effective for Bulk Use** Compared to high-end alternatives (e.g., ARP s stainless steel or titanium nuts), this kit provides a **balance of affordability and performance**, making it ideal for DIYers or professionals working on multiple projects.

8. **Compatibility with ARP s Ecosystem** If you already use ARP components (e.g., bolts, studs, or mounts), these nuts will integrate seamlessly, ensuring uniform strength and fit.

---

1. **Not as Corrosion-Resistant as Stainless Steel** While better than plain steel, **black oxide or zinc-plated nuts** may still rust over time in **highly corrosive environments** (e.g., saltwater, constant moisture, or extreme humidity). For marine or off-road applications, stainless steel (e.g., ARP s 304 or 316 variants) would be a better choice.

2. **Limited High-Temperature Performance** Steel nuts (even treated) may **soften or lose strength** at very high temperatures (above 300 F/150 C), which could be a concern in **exhaust systems, turbocharged engines, or high-performance racing applications**. For such cases, **stainless steel or Inconel nuts** would be preferable.

3. **Weight Consideration** Steel nuts are **heavier than aluminum or plastic alternatives**, which may be a drawback in **weight-sensitive applications** (e.g., racing cars, drones, or lightweight machinery).

4. **Potential for Thread Stripping (If Over-Tightened)** While ARP nuts are well-made, **improper torque or misalignment** can still strip threads, especially if the mating bolt is not properly seated or if the material is not perfectly aligned.

5. **Not Ideal for Dynamic Loads** In **vibrating or high-vibration environments** (e.g., suspension components under heavy loads), **locking nuts (e.g., ARP s Locknut or thread-locking adhesive)** may be necessary to prevent loosening.

6. **Limited Availability of Specialized Sizes** While 1/2" 20 is common, ARP s **premium nuts (e.g., stainless, titanium, or custom shapes)** may not be available in every size, requiring additional purchases for specialized applications.

7. **Cost Compared to Basic Nuts** While still reasonable, these nuts are **more expensive than generic steel nuts** from mass-market suppliers (e.g., McMaster-Carr, Rockford, or local hardware stores). The premium is justified by ARP s reputation for quality, but budget-conscious buyers may question the value if they don t need ARP s precision.

---

The **ARP TLX-ARP400-8607-CL360A70 Nut Kit (1/2" 20 Steel Hex)** is an **excellent choice for applications requiring reliability, precision, and durability** without the need for extreme corrosion resistance or high-temperature performance. It strikes a **strong balance between cost, quality, and versatility**, making it suitable for:

- **Automotive builds** (engine mounts, suspension, brake systems)

- **Mechanical and industrial assemblies** where standard steel nuts are adequate

- **DIY projects** where ARP s reputation for consistency is valued

- **Aftermarket modifications** where compatibility with other ARP parts is important

- **Extreme corrosion** (marine, off-road, saltwater)

- **Very high temperatures** (exhaust manifolds, turbochargers)

- **Ultra-lightweight requirements** (racing, aerospace)

- **Dynamic loads with high vibration** (without locking mechanisms)

then **stainless steel, titanium, or specialized locking nuts** would be a better investment.

---

You need **high-quality, precision steel nuts** for **automotive, mechanical, or industrial use**.

You re working on a **project where ARP compatibility** (e.g., engine mounts, suspension) is important.

You want **better durability than generic nuts** without paying for stainless steel or exotic materials.

Your environment is **moderately corrosive** (not extreme) and temperatures are **below 300 F**.

You require **superior corrosion resistance** **ARP stainless steel nuts (e.g., 304 or 316)**.

Your application involves **high heat** **Inconel or stainless steel nuts**.

You need **ultra-lightweight options** **Aluminum or titanium nuts**.

You re on a **tight budget** and generic nuts meet your needs **Standard steel nuts from a hardware store**.

**Final Verdict:** For most **performance automotive and mechanical applications**, this ARP nut kit is a **smart, reliable purchase** that justifies its cost with superior quality and longevity.

Details:

Nuts meet Raps exacting quality control standards and are black oxides. Supplier Title: ARP 1/2in-20 SS Hex Nut Kit. PRODUCT INFO: - ARP 1/2in-20 SS Hex Nut Kit, MANUFACTURER PART NUMBER: Part Number: 400-8607,: 1/2-20 hex, Stainless, 1/2 -20, Socket Size: 3/4 hex,: FEATURES Kit. All hex nuts are rated 180,000 psi tensile strength.

Built to outperform and outlast the competition. Made from the highest quality materials. Factory Sealed - Brand new in box.

part #: 661317386876 prices

• $31.34-$53.87

specifications otruckbedaccessories:

• brand: Arp
• mpn: Tlx-arp400-8607-cl360a70
• type: Automotive
• features: Easy Installation
• item height: 0.750
• item length: 0.250
• item weight: 0.2500
• fitment type: Direct Replacement
• generic keywords 1: See Notes
• intended use: Automobiles
• manufacturer warranty: 1 Year
• upc: 661317386876

payments otruckbedaccessories:

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shipping otruckbedaccessories:

• service: Expedited
• transit: 3-6 Days
• class: Expedited
• cost: $0.00
• type: Fixed

offer otruckbedaccessories:

• quantity: 1
• options: Ship-to-home
• availability: In Stock
• started: April 19, 2026
• sold: 0

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• paid by: Seller
• time: 30 Days
• policy: Returns Accepted

general otruckbedaccessories:

• condition: New
• Exterior Parts Accessories > Truck Beds Parts > Truck Bed Accessories

seller otruckbedaccessories:

• # reviews: 159092
• rating: 99.7%
• city: Arlington, TX

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