S-96551A310 0.894" ID x 1.41" OD ASME B18.21.1; MS35333-48; NASM35333 Mil. Spec. Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through internal tooth design that bites into mating surfaces, preventing fastener loosening in high-stress environments
• Enhanced corrosion protection with cadmium plating that provides excellent resistance to rust and environmental degradation
• Exceptional durability with Rockwell C40-50 hardness rating ensuring long-term performance under heavy loads
• Precise dimensional compatibility with 7/8" fasteners through 0.894" ID and 1.41" OD for perfect fit and optimal load distribution
• Industry-standard compliance meeting ASME B18.21.1, MS35333-48, and NASM35333 specifications for reliable performance
• Consistent thickness control between 0.052-0.060" ensuring uniform clamping force and reliable locking action
• Heavy-duty construction designed for demanding industrial applications requiring maximum security against vibration-induced failure

Professional Applications & Engineering Value

This 7/8" internal tooth lock washer delivers critical vibration resistance in heavy machinery, construction equipment, and industrial assemblies where constant motion and shock loads threaten fastener integrity. The cadmium-plated steel construction provides dual benefits: the steel core offers Rockwell C40-50 hardness for exceptional strength, while the cadmium plating creates a protective barrier against corrosion in harsh environments. The internal tooth configuration ensures positive locking by digging into both the fastener and bearing surface, eliminating the risk of spontaneous loosening that can lead to equipment failure. Engineered to meet ASME B18.21.1 and military specifications MS35333-48 and NASM35333, this washer provides reliable performance in automotive, aerospace, and heavy equipment applications where safety and reliability are paramount.

Specification Summary & Compliance

This heavy-duty tooth lock washer features precise inch dimensions with 0.894" internal diameter, 1.41" outer diameter, and controlled thickness between 0.052-0.060". Manufactured from cadmium-plated steel with Rockwell C40-50 hardness, it complies with ASME B18.21.1 mechanical standards and military specifications MS35333-48 and NASM35333. The internal tooth location provides optimal locking performance for 7/8" fasteners in demanding industrial applications requiring maximum vibration resistance and secure fastening.