S-96659A126 0.125" ID x 0.312" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel base material with black-oxide finish for extended service life in harsh environments
• Precise dimensional fit with 0.125" ID and 0.312" OD ensures proper alignment and load distribution for No. 4 screw applications
• Enhanced surface durability through black-oxide treatment providing additional wear resistance and reduced galling
• Industry-standard compliance with ASME B18.21.1 specifications guarantees consistent performance and interchangeability
• Environmental regulation compliance with RoHS 3 and REACH standards for safe use in regulated industries
• Optimized thickness range (0.025-0.040") provides flexibility while maintaining consistent pressure distribution
• Reliable material properties of 18-8 stainless steel offering excellent strength-to-weight ratio for demanding applications

Professional Applications & Engineering Value

These SAE flat washers in Black-Oxide 18-8 Stainless Steel deliver exceptional engineering value by solving critical industrial challenges. The combination of 18-8 stainless steel material and black-oxide surface treatment provides superior protection against corrosion, oxidation, and chemical exposure, making them ideal for outdoor equipment, marine applications, and chemical processing facilities. The precise 0.125" ID x 0.312" OD dimensions ensure perfect compatibility with No. 4 screw applications, preventing bolt loosening and maintaining consistent clamping force. Engineered to ASME B18.21.1 standards, these washers offer reliable performance in automotive assemblies, electrical enclosures, and precision machinery where vibration resistance and long-term reliability are paramount. The flat washer design effectively distributes load pressure, preventing surface damage and maintaining structural integrity in high-stress applications.

Specification Summary & Compliance

This SAE flat washer features precise dimensional specifications with 0.125" inner diameter, 0.312" outer diameter, and thickness ranging from 0.025" to 0.040". Manufactured from Black-Oxide 18-8 Stainless Steel, the product strictly conforms to ASME B18.21.1 engineering standards for flat washers. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance compliance. The washer is specifically designed for use with No. 4 screw sizes in inch measurement system applications, providing reliable performance in industrial and commercial fastening systems.