S-91950A043 0.125" ID x 0.312" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh environments including marine and chemical applications
• Precise dimensional fit with 0.125" ID and 0.312" OD ensures proper alignment and load distribution for No. 4 screws
• Consistent thickness control (0.025-0.040") provides reliable spacing and vibration resistance in assembled components
• ASME B18.21.1 compliance guarantees standardized quality and interchangeability across industrial applications
• Environmental regulation compliance with RoHS 3 and REACH ensures safe usage in regulated industries worldwide
• Excellent durability maintains structural integrity under continuous mechanical stress and temperature variations
• Broad compatibility with inch-system fasteners simplifies inventory management for maintenance and production teams

Professional Applications & Engineering Value

These 316 stainless steel SAE flat washers deliver critical engineering solutions where corrosion resistance and dimensional precision are paramount. The marine-grade 316 stainless steel composition provides exceptional protection against saltwater degradation, chemical exposure, and atmospheric corrosion, significantly extending service life in offshore equipment, chemical processing plants, and coastal infrastructure. The ASME B18.21.1 compliant flat washers ensure uniform load distribution across mating surfaces, preventing component fretting and thread damage in high-vibration environments. With their precision inch dimensions (0.125" ID × 0.312" OD), these washers maintain consistent clamping force in industrial assembly applications while the controlled thickness variation accommodates minor surface irregularities. The combination of standard compliance and superior material properties makes these washers indispensable for maintenance engineers seeking to reduce equipment downtime and replacement costs.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 standards with inch system dimensions: 0.125" internal diameter × 0.312" external diameter and 0.025-0.040" thickness range. These SAE flat washers maintain standard dimensional tolerances suitable for No. 4 screw applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and regulatory acceptance across global markets.