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Undercarriage Parts Segment Bolt and Nut for Excavator Dozer Grader

Engineered for reliability, this high-tensile tooth block screw is the critical fastener used to secure adapter tips, shanks, and cutting edges to excavator buckets and dozer blades. Manufactured from premium alloy steel and heat-treated to Grade 12.9, it provides superior resistance to torsion and shearing forces encountered in harsh digging environments. The precision-machined threads and robust head design ensure a tight, vibration-resistant fit, preventing loosening during heavy operation. An essential spare part for maintaining the structural integrity of your ground engaging tools (GET).

    Overview

    This high-tensile Tooth Block Screw (also known as an Adapter Bolt or Segment Bolt) is a critical fastening component designed for heavy-duty earthmoving machinery. It is engineered to securely attach cutting edges, blade segments, and adapter tips to excavator buckets and bulldozer blades. Manufactured to meet rigorous industry standards, this bolt ensures maximum stability and safety in extreme operating conditions.

    Key Features

    • Superior Material Strength: Forged from high-quality 40Cr Alloy Steel, offering excellent toughness and durability.
    • High Hardness Grade: Heat-treated to achieve Grade 12.9 tensile strength, providing exceptional resistance to stretching and deformation.
    • Precision Design: Features a specialized head profile (Round/Flat Head with drive slots) designed to sit flush against the blade or adapter, minimizing wear and preventing loosening under high vibration.
    • Anti-Corrosion Finish: Treated with a protective coating (black oxide or similar) to resist rust and corrosion in harsh environments.
    • Easy Installation: Designed for quick assembly and disassembly, reducing machinery downtime during maintenance.

    Technical Specifications

    • Product Name: Tooth Block Screw / Adapter Bolt
    • Material: 40Cr Alloy Steel
    • Hardness Grade: 12.9 (High Tensile)
    • Head Type: Round/Flat Head with Drive Slots (as per image)
    • Thread Type: Metric Coarse Thread (Standard for construction machinery)
    • Surface Treatment: Black Oxide / Phosphating / Painted (Customizable)
    • OEM Number Reference: Compatible with standard series (e.g., 114 series, specific numbers depend on exact sizing)

    Applications

    Widely used in the undercarriage and ground engaging tools of various construction machinery, including:
    • Excavators: Securing bucket adapters and side cutters.
    • Bulldozers: Fixing cutting edges and end bits.
    • Motor Graders: Attaching blade segments.
    • Loaders: Bucket tooth systems.
    For more details, please contact us.