· Product Overview

· Core Specifications

• Material: 4140 Alloy Steel (Quenched & Tempered)Tensile strength ≥850 MPa, hardness HRC 48–52 (resists deformation under automotive load/vibration); suitable for high-stress mechanical connections.
• Manufacturing Standard: IATF 16949 (Automotive Quality Management System)
  • Key Processes: CNC turning (stepped profile + internal bore) → Precision drilling/tapping (side locking screw hole) → Quenching & tempering (hardness enhancement) → Black oxide surface treatment (corrosion resistance).
  • Key Parameters:
    • Standard Dimensions: Step diameter (20mm/15mm), length (50mm), internal bore diameter (10mm) (fully customizable)
    • Side Screw Hole: M4 (for locking pins/shafts)
    • Dimensional Tolerance: ±0.02mm (meets automotive component fit requirements)
  • Surface Finish: Black oxide (10μm thickness; 72-hour salt spray corrosion resistance, ideal for engine/chassis environments).

· Application Scenarios

• Engine Bay Components: Connecting fuel system brackets, sensor mounting shafts, or valve cover mechanical parts (resists heat/vibration).
• Chassis & Suspension: Positioning suspension link components, brake system mounting hardware, or steering system fasteners.
• Drivetrain Systems: Fastening transmission accessory parts, driveshaft support components, or differential housing mounts.
• Automotive Customization: Securing aftermarket performance parts (e.g., turbocharger brackets, exhaust system components).
• Commercial Vehicle Components: Heavy-duty truck chassis part connections or bus drivetrain fasteners.

· Production Process Introduction

1. Material Sourcing: Procure IATF 16949-certified 4140 alloy steel bars (traceable to automotive supply chain standards).
2. CNC Turning: Use precision CNC lathes to machine the stepped cylindrical profile, internal bore, and mating surfaces to tight dimensional tolerances.
3. Drilling & Tapping: Add the side locking screw hole (M4 standard) via CNC to ensure alignment with internal bore.
4. Heat Treatment: Quench and temper the connectors to achieve target hardness and vibration resistance.
5. Surface Treatment: Apply black oxide coating to enhance corrosion resistance in automotive harsh environments.
6. Quality Inspection: Conduct CMM dimensional scans, hardness testing, and salt spray corrosion validation (per IATF 16949 requirements).
7. Sorting: Group connectors by specification for automotive supply chain compatibility.

· Packaging and Shipping Methods

• Packaging: Each connector is wrapped in anti-scratch, anti-corrosion film; bulk orders are packed in foam-lined, labeled cardboard boxes (compliant with automotive parts packaging standards, including part number/traceability labels).
• Shipping: Flexible logistics tailored to automotive supply chains:
  • Express Delivery (DHL/FedEx: 3–5 business days for sample orders)
  • Air Freight (7–10 business days for small-batch production)
  • Sea Freight (20–25 business days for bulk automotive orders)All shipments include full traceability documentation and damage insurance.

· Process

· Frequently Asked Questions (FAQ)

• MOQ (Minimum Order Quantity): 1,000 pieces per standard specification (aligned with automotive batch production needs); small sample packs (50–100 pieces) are available for prototype validation.
• Lead Time: Standard lead time is 10–15 working days (includes heat treatment & IATF-compliant inspection); expedited production (7–10 working days) is available for urgent automotive prototype orders (additional fees apply).
• Customization Capability: Full customization is supported—we can adjust step dimensions, internal bore size, side screw hole specification, or upgrade to 304 stainless steel (for interior automotive components) based on your automotive component drawings. Our engineering team validates designs for IATF 16949 compliance and vibration resistance.