S-91755A135 0.235" ID x 0.39" OD Self-Retaining Washers
Self-Retaining Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Temperature & Environment Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Exceptional temperature resilience for reliable performance in environments ranging from -40°F to 180°F, preventing material failure under thermal stress.
- Superior vibration resistance due to the self-retaining design, ensuring the washer stays securely in place during assembly and operation.
- Excellent corrosion and chemical resistance from Nylon Plastic material, ideal for harsh or moisture-prone industrial settings.
- Durable wear resistance with a Rockwell R120 hardness, maintaining integrity under repeated load and friction.
- Broad compatibility with both No. 8 (inch) and M4 (metric) screw sizes, simplifying inventory for mixed-system applications.
- Precise dimensional fit with 0.235" ID and 0.39" OD, enabling easy installation and reducing the risk of misalignment.
- Environmentally safe and regulated with RoHS 3 compliance, meeting global standards for hazardous substance restrictions.
Professional Applications & Engineering Value
This Nylon Plastic Self-Retaining Washer is engineered to address common challenges in industrial assembly, such as loosening under vibration and degradation in variable climates. Its self-retaining feature locks the washer onto screws, streamlining installation in automated or high-speed production lines while minimizing rework. The nylon material offers inherent electrical insulation and resistance to oils, solvents, and UV exposure, making it suitable for electrical enclosures, automotive components, and outdoor machinery. With a temperature range of -40°F to 180°F, it performs reliably in extreme environments, from freezing cold storage to heated engine compartments, ensuring long-term fastener security without galling or corrosion.
Specification Summary & Compliance
This washer meets precise dimensional standards with an inner diameter of 0.235", outer diameter of 0.39", and thickness ranging from 0.022" to 0.042". It is designed for No. 8 (inch) and M4 (metric) screw sizes, supporting both measurement systems. Manufactured from Nylon Plastic with a Rockwell R120 hardness, it ensures consistent performance and is fully RoHS 3 (2015/863/EU) compliant, adhering to environmental regulations for hazardous substances.
