ARP M9 x 1.0 13mm Wrenching Nut Kit - 301-8308

The ARP M9 x 1.0 13mm Wrenching Nut Kit (Part #301-8308) is a precision fastener component from ARP — one of the most trusted names in high-performance hardware. Whether you're assembling an engine, securing suspension components, or completing a custom build, ARP nuts are engineered to the exacting tolerances that performance and racing applications demand. This kit is a regularly stocked product at ThreePiece.us, meaning it's ready to ship when you need it.

Key Features & Benefits

• M9 x 1.0 Thread Specification: Precisely machined to M9 x 1.0 thread pitch, ensuring proper engagement and clamping force without cross-threading or stripped threads.
• 13mm Wrenching Surface: The 13mm hex wrenching size allows use with standard metric sockets and wrenches, making installation and removal straightforward in tight engine bay or chassis locations.
• ARP Quality Engineering: ARP has built its reputation on fasteners used in professional motorsport and serious street builds. Their nuts and bolts are manufactured to tight tolerances, offering consistent performance across demanding applications.
• Proposition 65 Compliance Noted: This product is flagged for California Proposition 65, which is standard disclosure for many performance metal fasteners — a sign that ARP is transparent about material composition.
• Compact and Convenient Kit Format: Sold as a kit (Part #301-8308), this is a practical solution for builders who need to source individual metric nuts in specific sizes without purchasing bulk quantities they don't need.

Specifications

• Brand: ARP
• Part Number: 301-8308
• Thread Size: M9 x 1.0
• Wrenching Size: 13mm
• California Proposition 65: Yes

Fitment

This ARP nut kit is a universal metric fastener component and does not have specific vehicle application data tied to a year, make, or model. It is intended for use wherever an M9 x 1.0 threaded nut with a 13mm wrenching surface is required — commonly encountered in engine builds, cylinder head assemblies, suspension fabrication, and custom bracket work across a wide range of vehicles and applications. Because fitment depends entirely on the specific hardware requirement of your project, we strongly recommend verifying that M9 x 1.0 is the correct thread specification for your application before ordering. Our fitment specialists are available to help if you have questions.

What's in the Box

Based on available product data, this listing is for the ARP M9 x 1.0 13mm Wrenching Nut Kit, Part #301-8308. As with all ARP kit hardware, contents are specific to the part number. Please confirm quantity requirements for your build prior to purchase, as individual kit contents are defined by ARP's part configuration for this SKU.

Why Buy from ThreePiece.us

• Free Shipping on Every Order: The ARP 301-8308 ships free to the continental US — no minimum order required.
• Affirm Financing Available: Break your purchase into manageable payments with Affirm financing, available at checkout.
• Expert Fitment Support: ThreePiece.us has served 10,000+ customers with hands-on fitment expertise. Not sure if this is the right ARP nut for your application? Contact our team and we'll help you verify before you buy.
• Regularly Stocked Product: This item is listed as a regularly stocked product, so you won't face the long lead times associated with special-order or custom parts.
• 10+ Years of Experience: Since 2014, ThreePiece.us has been a go-to source for performance hardware, wheels, and accessories — with a team that takes fitment seriously.

Frequently Asked Questions

Q: What thread size and wrenching size does this ARP nut use?
A: This kit is specifically M9 x 1.0 thread pitch with a 13mm wrenching surface, as indicated in the product name and part number 301-8308. Always confirm your application requires this exact specification before ordering.

Q: Does this ARP nut kit fit a specific vehicle?
A: No — the ARP 301-8308 does not have vehicle-specific fitment application data. It is a universal metric fastener used wherever an M9 x 1.0 nut is required in your build or assembly. If you're unsure, reach out to our fitment team for guidance.

Q: Is this item in stock and ready to ship?
A: Yes. The ARP 301-8308 is listed as a regularly stocked product at ThreePiece.us and ships free on every order.

Q: Can I use financing to purchase this item?
A: Yes — financing is available through Affirm at checkout, allowing you to spread the cost of your order over time.