S-91113A032 0.448" ID x 0.789" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress environments, ensuring long-term assembly integrity.
• Zinc-plated steel construction provides excellent corrosion resistance, extending service life in various industrial conditions.
• Internal tooth design delivers maximum locking force by biting into both the fastener and mating surface for secure fastening.
• Rockwell C44 hardness rating ensures exceptional durability and maintains tooth integrity under repeated loading cycles.
• ASME B18.21.1 compliance guarantees consistent quality and dimensional accuracy for reliable performance in critical applications.
• RoHS 3 and REACH compliance meets international environmental regulations for safe use across global markets.
• Precise 0.448" ID and 0.789" OD dimensions ensure perfect fit for 7/16" fasteners, eliminating installation issues.

Professional Applications & Engineering Value

These zinc-plated steel tooth lock washers solve critical vibration-induced loosening problems in heavy machinery, automotive assemblies, and structural frameworks. The internal tooth configuration creates multiple biting points that resist rotational forces and maintain clamp load under dynamic conditions. Engineered with Rockwell C44 hardness, the teeth maintain their sharpness and locking capability through numerous torque cycles. The zinc plating provides essential corrosion protection while the precise 0.448" ID ensures proper seating on 7/16" fasteners. These industrial washers deliver reliable performance in applications where vibration resistance is paramount, from manufacturing equipment to transportation systems.

Specification Summary & Compliance

This tooth lock washer features precise dimensions of 0.448" ID × 0.789" OD with thickness ranging 0.032-0.040". Manufactured to ASME B18.21.1 standards for dimensional consistency and performance reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting current environmental requirements for industrial components. The inch system measurement ensures compatibility with standard imperial fasteners and equipment specifications.