S-91755A119 0.209" ID x 0.433" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with self-retaining design that securely locks onto No. 10 or M5 screws, preventing loosening in high-motion applications
• Excellent chemical resistance due to polyethylene plastic construction, ideal for harsh industrial environments and corrosive substances
• Consistent performance across temperature extremes, maintaining integrity from 35°F to 145°F without deformation or brittleness
• Optimized dimensional stability with precise 0.209" ID and 0.433" OD ensuring perfect fit and uniform load distribution
• Durable yet flexible protection from Durometer 43D hardness, providing cushioning while resisting wear and compression set
• Environmental compliance assurance with RoHS 3 (2015/863/EU) certification, meeting global regulatory standards for hazardous substance restrictions
• Dual-standard compatibility for both inch (No. 10) and metric (M5) screw systems, simplifying inventory and international project specifications

Professional Applications & Engineering Value

These polyethylene plastic self-retaining washers deliver critical engineering solutions where standard washers fail. The self-retaining feature eliminates costly re-tightening cycles in vibration-prone assemblies like machinery mounts, automotive components, and conveyor systems. Manufactured from high-density polyethylene, they provide exceptional chemical resistance against oils, solvents, and mild acids while maintaining dimensional stability across the 35°F to 145°F operating range. The 0.045-0.057" thickness range and Durometer 43D hardness create an optimal balance between sealing capability and shock absorption, making them ideal for electrical enclosures, plumbing fixtures, and precision equipment requiring reliable long-term performance without metal corrosion concerns.

Specification Summary & Compliance

Precision-engineered with 0.209" inner diameter and 0.433" outer diameter with thickness tolerance of 0.045-0.057" for consistent performance. Compatible with No. 10 (inch) and M5 (metric) screw sizes with material hardness rated at Durometer 43D. Manufacturing complies with RoHS 3 (2015/863/EU) directives ensuring full restriction of hazardous substances. Temperature rating certified for continuous operation between 35°F and 145°F without performance degradation.