Double-Ended HF Bolt (M14X120 + M10X16) for Tesla Model 3/Y (2017-) | 1456640-00-A

1. Key Specifications & Compatibility

2. Why This Brand-Grade Double-Ended Bolt Is Critical for Your Model 3/Y

1. Dual-Component Alignment: The M14X120 + M10X16 dual-threaded design ensures two paired components (e.g., subframe and chassis) align perfectly during installation. Generic single-thread bolts require separate fasteners, increasing misalignment risk that causes uneven tire wear or suspension noise.
2. Handles Multi-Directional Loads: [109] steel’s 1000 MPa tensile strength transfers load evenly between connected components, resisting forces from acceleration, braking, and road bumps. Low-grade double-ended bolts (e.g., 8.8-grade steel) bend under such loads, leading to component shifts.
3. Corrosion Protection for Hidden Areas: ZNFL+CMAT coating prevents rust in hidden mounting points (e.g., subframe gaps) where moisture and salt accumulate. Generic bolts rust in these hard-to-reach areas, seizing components together and making future maintenance impossible without drilling.
4. Vibration-Resistant Connection: The ISO-standard threads on both ends lock tightly with factory nuts, avoiding loosening from constant vehicle vibration (a common issue with generic bolts that have inconsistent thread spacing).

3. What It Actually Does (No Tech Jargon)

• Connects Two Critical Parts: This bolt acts as a “bridge” between paired components (like the suspension subframe and car chassis), keeping them aligned and secure—so they work together smoothly, even when you hit potholes or drive over rough roads.
• Won’t Rust in Hidden Spots: Its double corrosion protection means it won’t rust in hard-to-clean areas (like under the car’s subframe) where salt and water get trapped. Rusty bolts here can lock parts together, making repairs super expensive.
• Stays Tight No Matter What: The threads on both ends fit factory nuts perfectly, so the bolt doesn’t loosen from vibration (unlike cheap bolts that wiggle loose over time, causing rattling or component damage).
• Fits Like Factory: It’s the exact dual-thread size Tesla uses—no forcing parts together or modifying holes. You can install it quickly and be sure the components line up right.

4. Signs You Need to Replace This Bolt

• Visible Rust/Corrosion: The bolt’s surface (even if partially hidden) is rusted, flaking, or discolored (ZNFL+CMAT coating has failed, and steel is weakening—risk of breakage under load).
• Bolt Damage: The bolt is bent, has stripped threads on either end, or shows signs of cracking (can’t secure components properly, or will fail during driving).
• Component Misalignment: The paired parts (e.g., subframe and chassis) sit unevenly, or you hear clunking noises from the undercarriage—signals the bolt is loose or stretched, causing misalignment.
• Post-Repair Replacement: If you’re servicing connected components (e.g., replacing a suspension subframe), always install a new bolt (used bolts have hidden stress damage that leads to sudden failure).
• Seized Components: The paired parts are stuck together (due to rusted bolt), and the old bolt had to be cut or drilled out—requires a new bolt to resecure the components safely.

5. Why This Brand-Grade Bolt Outperforms Generic Alternatives

• Authentic Dual-Thread Sizing: Generic bolts claim “M14+M10” but have inconsistent thread lengths (e.g., M14 end too short) that misalign components. This bolt’s M14X120 + M10X16 dimensions match Tesla’s factory specs exactly.
• Genuine [109] Steel Strength: Generic double-ended bolts use 8.8-grade steel (800 MPa) that bends under load. This bolt uses [109] steel (1000 MPa), matching Tesla’s strength requirements for multi-component connections.
• Dual Corrosion Protection: Generic bolts use single-layer zinc plating that rusts in 6–12 months. ZNFL+CMAT here lasts 5+ years, resisting corrosion in hidden mounting points.
• Precision Threads: Generic bolts have uneven thread spacing that strips factory nuts or loosens over time. This bolt’s ISO-standard threads fit Model 3/Y’s nuts perfectly, ensuring a secure, long-lasting connection.

6. Installation & What You Receive

• 1x Double-Ended HF Bolt (M14X120 + M10X16) (1456640-00-A)
• Digital Installation Guide: Step-by-step tips for safe, accurate installation, including:
  • Recommended tools: Torque wrench (to apply 85–95 Nm for M14 end, 40–50 Nm for M10 end—never use impact wrenches, as they over-tighten and damage threads or components).
  • Prep steps: Clean both mounting holes and component threads with a brush (remove debris to avoid cross-threading; debris can cause uneven torque).
  • Alignment tip: Tighten the M14 end first to secure the main component, then torque the M10 end to align the secondary part—avoids misalignment.

7. After-Sales Support

• Warranty: Backed by a limited warranty. For detailed coverage terms (e.g., duration, eligible defects like coating failure, thread damage, or material weakness), please reach out to our team.
• Technical Assistance: Our EV specialists have hands-on experience with Model 3/Y’s multi-component fastening systems—they’re available via email or chat to answer questions (e.g., “Which components use this double-ended bolt?” or “How to align parts during installation?”) and help resolve issues smoothly.

Company Profile

Guangzhou Fuheng Auto Parts Supply Chain Co., Ltd., located in the Guangzhou auto parts business district, adheres to the business philosophy of "quality first, pragmatic innovation, service-oriented, and co creation and win-win", and has established the independent brand "CheFuning". The Che Funing brand regards human resources as the foundation of the enterprise and attaches great importance to the construction of the talent team; The Che Funing brand regards product quality as the life of the enterprise, and every single product from screws to accident parts is carefully selected.

The CheFuning brand helps partners transform from traditional fuel vehicles to new energy vehicle models, expands from a single horizontal vulnerable parts operation to a new energy full vehicle parts channel enterprise, upgrades from regional chain stores to independent brands of new energy full vehicle series, standardizes the operation of independent brands in the new energy industry, and integrates resources to reduce costs and increase efficiency, occupying the commanding heights of enterprise management.