S-98017A610 0.125" ID x 0.312" OD NAS1149-CN432R; AN960-C4; ASME B18.21.1 Mil. Spec. Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction for extended service life in harsh environments
• Exceptional load distribution with precise 0.125" ID and 0.312" OD dimensions to prevent surface damage and maintain joint integrity
• Consistent performance backed by Rockwell B70 hardness rating for reliable mechanical strength and wear resistance
• Guaranteed interchangeability through compliance with NAS1149-CN432R, AN960-C4, and ASME B18.21.1 specifications
• Environmental responsibility with full RoHS 3 and REACH compliance for sustainable industrial operations
• Perfect fit compatibility specifically designed for No. 4 screw sizes in inch measurement systems
• Optimized thickness tolerance (0.028-0.036") ensuring uniform pressure distribution and vibration resistance

Professional Applications & Engineering Value

These passivated 18-8 stainless steel flat washers deliver critical engineering solutions where corrosion resistance and dimensional precision are paramount. The 0.125" ID flat washer configuration provides optimal load distribution for No. 4 screw applications in aerospace, marine, and industrial equipment. The passivated surface treatment creates an enhanced protective oxide layer that significantly outperforms standard stainless steel in corrosive environments, preventing galvanic corrosion and maintaining structural integrity. With controlled 0.028-0.036" thickness and Rockwell B70 hardness, these components ensure consistent clamping force and vibration dampening in critical assemblies, reducing maintenance frequency and extending equipment service life across demanding industrial applications.

Specification Summary & Compliance

Manufactured to exacting NAS1149-CN432R, AN960-C4, and ASME B18.21.1 specifications, these flat washers guarantee dimensional accuracy and performance reliability. The inch-system components feature precise internal diameter (0.125"), outer diameter (0.312"), and thickness tolerance (0.028-0.036") for consistent fit and function. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and regulatory adherence for global industrial applications.