S-91475A273 0.167" ID x 0.293" OD ASME B18.21.1; MS35338-42 Mil. Spec. Split Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with Rockwell C38 hardness to maintain secure fastening in high-stress environments
• Enhanced corrosion protection from zinc yellow-chromate plating for extended service life in harsh conditions
• Precise No. 8 screw compatibility with 0.167" ID ensuring perfect fit and reliable performance
• Optimal load distribution through 0.293" OD design that minimizes surface damage and improves joint integrity
• Industry-standard compliance with ASME B18.21.1 and MS35338-42 specifications for guaranteed quality and interchangeability
• Durable steel construction providing consistent spring action and reusability across multiple installation cycles
• Split lock design that creates continuous tension to prevent loosening under dynamic loads and thermal cycling

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these split lock washers deliver exceptional performance in machinery assembly, automotive systems, and electrical enclosures where vibration-induced loosening compromises safety and operational efficiency. The zinc yellow-chromate plated steel construction provides dual-layer protection against corrosion while maintaining the necessary spring tension for permanent fastening security. The standard split lock washer design ensures consistent biting action into both bearing surfaces, creating reliable resistance against rotational forces and thermal expansion/contraction cycles. With precise dimensional control (0.167" ID, 0.293" OD) for No. 8 screw size applications, these washers eliminate play and maintain clamp load in critical joints, reducing maintenance frequency and preventing costly downtime in production environments.

Specification Summary & Compliance

This split lock washer features inch system dimensions with 0.167" internal diameter, 0.293" outer diameter, and 0.040" thickness, manufactured to ASME B18.21.1 and MS35338-42 specifications for dimensional accuracy and performance reliability. The Rockwell C38 hardness ensures consistent spring properties, while the zinc yellow-chromate plating meets industry standards for corrosion resistance. Compliant with relevant industrial fastener requirements for vibration-resistant applications.