S-91755A161 0.57" ID x 1.031" OD Self-Retaining Washers

Key Features & Benefits at a Glance

• Secure Vibration Resistance: Self-retaining design prevents loosening under dynamic loads, reducing maintenance needs and improving assembly reliability.
• Excellent Chemical & Corrosion Resistance: Made from durable Nylon Plastic, offering superior performance in harsh environments without rusting or degrading.
• Wide Temperature Tolerance: Operates reliably from -40°F to 180°F, ensuring consistent performance in both freezing and elevated temperature applications.
• Precision Fit for 7/16" Screws: 0.57" ID and 1.031" OD provide accurate alignment and even load distribution, minimizing wear on connected components.
• High Hardness for Longevity: Rockwell R120 hardness resists deformation under pressure, extending service life in high-stress assemblies.
• Environmental & Regulatory Compliance: RoHS 3 (2015/863/EU) Compliant for safe use in regulated industries and eco-conscious supply chains.
• Lightweight & Non-Conductive: Nylon construction reduces overall weight and provides electrical insulation, ideal for electronic and automotive applications.

Professional Applications & Engineering Value

This Nylon Plastic Self-Retaining Washer addresses common industrial challenges such as component slippage, corrosion-induced failure, and thermal expansion mismatches. Its self-retaining feature ensures it stays firmly in place during vibration-heavy operations, which is critical in automotive, machinery, and electronics assemblies. The nylon material offers inherent resistance to oils, solvents, and moisture, preventing degradation that metal washers often face. With an operating range from -40°F to 180°F, it maintains dimensional stability in extreme conditions, reducing the risk of assembly failure. The precise 0.57" ID and 1.031" OD in the inch system provide a snug fit for 7/16" screws, ensuring uniform pressure distribution and protecting sensitive surfaces from damage. This makes it a reliable choice for engineers seeking durability and compliance in demanding environments.

Specification Summary & Compliance

This washer features an inner diameter of 0.57", outer diameter of 1.031", and thickness ranging from 0.052" to 0.072", designed for use with 7/16" screw size in inch measurement systems. It complies with RoHS 3 (2015/863/EU) regulations, ensuring it is free from hazardous substances. The material, Nylon Plastic with a Rockwell R120 hardness, provides consistent performance within the specified temperature range of -40°F to 180°F, meeting industry standards for reliability and safety in various applications.