S-91755A313 0.126" ID x 0.217" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with self-retaining design to prevent loosening in dynamic applications
• Excellent thermal stability across a wide -40°F to 180°F range for reliable performance in varying environments
• High durability from Rockwell R120 hardness nylon, ensuring long service life and wear resistance
• Precise fit with 0.126" ID and 0.217" OD for secure mounting on No. 4 and M3 screws
• Corrosion-free and lightweight off-white nylon construction, ideal for sensitive or weight-critical assemblies
• RoHS 3 compliance for environmentally safe use in global markets
• Dual system compatibility with inch and metric screw sizes, simplifying inventory and sourcing

Professional Applications & Engineering Value

This nylon self-retaining washer is engineered to address common industrial challenges like vibration-induced fastener failure and thermal expansion issues. Made from high-grade nylon plastic with Rockwell R120 hardness, it maintains structural integrity under mechanical stress and extreme temperatures from -40°F to 180°F. The self-retaining feature ensures consistent positioning during assembly, reducing installation time and preventing misalignment in automotive, electronics, and machinery applications. Its off-white color and non-conductive properties make it suitable for electrical insulation and corrosive environments, while precise dimensions (0.126" ID, 0.217" OD) guarantee a snug fit for No. 4 and M3 screws, enhancing overall assembly reliability and reducing maintenance needs.

Specification Summary & Compliance

This washer features an ID of 0.126", OD of 0.217", and thickness range of 0.081-0.093", designed for screw sizes No. 4 and M3 with standard inch and metric compatibility. It adheres to RoHS 3 (2015/863/EU) compliance and offers reliable performance across a temperature range of -40°F to 180°F, backed by Rockwell R120 hardness for consistent quality in industrial use.