S-91083A030 0.344" ID x 0.688" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution - 0.688" OD and 0.344" ID provide optimal surface contact, reducing stress and preventing surface damage under 5/16" screw heads.
• Durable Steel Construction - Manufactured from robust steel for long-lasting performance in demanding industrial environments.
• Precision ASME Compliance - Meets ASME B18.21.1 specifications ensuring reliable dimensional accuracy and interchangeability.
• Environmental Responsibility - RoHS 3 and REACH compliant, safe for use in regulated industries and environmentally conscious applications.
• Versatile Industrial Application - Ideal for machinery, equipment assembly, and maintenance where consistent flat washer performance is critical.
• Corrosion Resistance Ready - Steel material provides excellent base for additional coatings if enhanced corrosion protection is required.
• Cost-Effective Reliability - Standard SAE design ensures easy sourcing and replacement, minimizing downtime and maintenance costs.

Professional Applications & Engineering Value

This SAE flat washer delivers critical engineering value through its precise steel construction and standardized dimensions. The 0.688" outer diameter and 0.344" inner diameter are engineered to perfectly accommodate 5/16" screw applications, providing essential load distribution that prevents joint loosening and surface deformation in heavy machinery, automotive assemblies, and industrial equipment. The flat washer design solves common vibration-induced failures by maintaining consistent clamping force, while the ASME B18.21.1 compliance ensures dimensional precision for seamless integration into existing inch system assemblies. These industrial washers are particularly valuable in maintenance operations and OEM manufacturing where reliability and standardization are paramount.

Specification Summary & Compliance

This flat washer features precise dimensional specifications with 0.688" OD, 0.344" ID, and thickness ranging 0.051-0.080". Manufactured in compliance with ASME B18.21.1 standards for dimensional accuracy and performance. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations (updated 06/14/2023, 235 SVHC), ensuring environmental responsibility and regulatory adherence for global industrial applications.