S-91201A029 0.281" ID x 0.625" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior Load Distribution - The precise 0.625" OD and 0.281" ID ensure even pressure distribution, preventing surface damage and loosening under vibration.
• Enhanced Durability - Manufactured from high-strength steel with a Rockwell B84 hardness rating, providing excellent resistance to deformation and long-term reliability.
• Precision Fit for 1/4" Screws - Specifically designed inner diameter guarantees a secure fit, reducing installation time and improving assembly accuracy.
• Consistent Performance - Tight thickness tolerance (0.120-0.130") ensures uniform clamping force and reliable performance in repetitive industrial applications.
• Environmental Compliance - Meets RoHS 3 and REACH standards, making it safe for use in regulated industries and global supply chains.
• Corrosion Resistance - The steel construction offers inherent protection against rust, extending service life in demanding environments.
• Versatile Inch System Compatibility - Designed for seamless integration with standard inch fasteners, simplifying inventory and procurement for North American operations.

Professional Applications & Engineering Value

This steel flat washer is engineered to solve critical challenges in industrial assembly and maintenance. Its robust steel construction and Rockwell B84 hardness provide exceptional resistance to wear and compression, making it ideal for high-vibration environments like machinery, automotive systems, and structural frameworks. The precise 0.281" ID ensures a perfect match for 1/4" screw size fasteners, eliminating play and reducing the risk of joint failure. By distributing load evenly across surfaces, it prevents bolt head embedding and material fatigue, extending the lifespan of connected components. Furthermore, its compliance with RoHS 3 and REACH standards guarantees that it meets stringent environmental and safety regulations, making it a reliable choice for OEMs and MRO applications worldwide.

Specification Summary & Compliance

This flat washer adheres to standard inch system dimensions with an inner diameter of 0.281", outer diameter of 0.625", and thickness ranging from 0.120" to 0.130". It is manufactured from high-grade steel with a hardness of Rockwell B84, ensuring consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel, and REACH (EC 1907/2006) standards as of January 17, 2023, covering 233 SVHCs, confirming its suitability for industrial and international markets.