S-97775A110 0.115" ID x 0.26" OD ASME B18.21.1; MS35335-57 Mil. Spec. External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Exceptional corrosion resistance thanks to 410 stainless steel construction for long service life in harsh environments
• Precision dimensional compatibility with 0.115" ID and 0.26" OD ensuring perfect fit for No. 4 screw applications
• Enhanced mechanical durability with Rockwell C40 hardness maintaining tooth integrity under repeated stress
• Guaranteed interchangeability through compliance with ASME B18.21.1 and MS35335-57 standards
• Reliable performance in critical applications with external tooth design providing maximum locking security
• Environmental compliance assurance meeting RoHS 3 and REACH regulations for safe industrial use

Professional Applications & Engineering Value

This external tooth lock washer delivers critical vibration-resistant fastening solutions for industrial equipment, automotive assemblies, and precision machinery. The 410 stainless steel construction provides excellent corrosion resistance in demanding environments, while the precisely engineered external teeth create superior biting action that prevents rotational loosening under continuous vibration and thermal cycling. With Rockwell C40 hardness, these washers maintain structural integrity and locking performance even after multiple installation cycles. The combination of inch system dimensions (0.115" ID, 0.26" OD) and No. 4 screw compatibility makes them ideal for aerospace, military, and heavy machinery applications where reliable fastening is non-negotiable. Engineered to meet ASME B18.21.1 and MS35335-57 specifications, these washers ensure consistent performance and interchangeability across industrial maintenance and manufacturing operations.

Specification Summary & Compliance

This external tooth lock washer features precise dimensional specifications including 0.115" internal diameter, 0.26" outer diameter, and thickness ranging from 0.015" to 0.019". Manufactured from 410 stainless steel with Rockwell C40 hardness, the washer complies with ASME B18.21.1 and MS35335-57 standards for tooth lock washers. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications. Designed specifically for No. 4 screw sizes in inch measurement systems, this washer delivers reliable locking performance with external tooth configuration.