S-97775A516 0.897" ID x 1.41" OD ASME B18.21.1; MS35335-69 Mil. Spec. External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress applications, ensuring long-term assembly integrity.
• External tooth design bites aggressively into mating surfaces for maximum grip and anti-rotation performance.
• 410 Stainless Steel construction provides excellent corrosion resistance and durability in demanding industrial environments.
• Rockwell C40 hardness offers high mechanical strength and resistance to wear under heavy loads.
• Precision-engineered dimensions (0.897" ID, 1.41" OD) ensure perfect fit for 7/8" fasteners, reducing installation time.
• Compliance with ASME B18.21.1 and MS35335-69 standards guarantees consistent quality and interchangeability.
• RoHS 3 and REACH compliance makes it suitable for global supply chains with strict environmental regulations.

Professional Applications & Engineering Value

This 7/8" tooth lock washer is engineered to solve critical vibration-induced loosening in heavy machinery, construction equipment, and automotive assemblies. The 410 Stainless Steel material provides reliable corrosion resistance, while the external tooth location ensures deep biting action into both the fastener and workpiece. This design maintains clamping force in dynamic load conditions, preventing catastrophic failures. Ideal for vibration-resistant applications requiring ASME B18.21.1 compliance, it delivers predictable locking performance in inch-system assemblies where safety and reliability are paramount.

Specification Summary & Compliance

This washer features dimensional precision with 0.897" ID, 1.41" OD, and 0.052-0.060" thickness for 7/8" screw sizes. Manufactured to ASME B18.21.1 and MS35335-69 specifications, it ensures mechanical compatibility. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting international environmental standards for hazardous substances.