S-98029A025 0.156" ID x 0.312" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through black-oxide steel surface treatment, extending service life in demanding environments
• Precise dimensional fit with 0.156" ID and 0.312" OD ensures perfect alignment with No. 6 screws
• Optimal load distribution across 0.049-0.068" thickness range prevents surface damage and fastener loosening
• Industrial-grade durability from carbon steel construction withstands high-stress assembly applications
• Regulatory compliance assurance with RoHS 3 and REACH standards for global market acceptance
• Versatile inch system compatibility for seamless integration with existing imperial measurement equipment
• Reliable performance in mechanical assemblies requiring consistent spacing and vibration resistance

Professional Applications & Engineering Value

These black-oxide steel flat washers deliver critical engineering solutions for industrial assembly challenges. The black-oxide surface treatment provides superior corrosion protection compared to untreated steel, making these flat washers ideal for applications exposed to moisture, chemicals, or outdoor elements. With precise 0.156" ID and 0.312" OD dimensions, they ensure perfect fitment with No. 6 screw sizes, eliminating misalignment issues that can compromise assembly integrity. The controlled 0.049-0.068" thickness range maintains consistent spacing and pressure distribution, preventing surface marring and reducing stress concentration points in mechanical assemblies. These components are engineered to address common industrial pain points including fastener loosening due to vibration, galvanic corrosion, and dimensional inconsistency across production batches.

Specification Summary & Compliance

This flat washer maintains standard inch system dimensions with internal diameter of 0.156", outer diameter of 0.312", and thickness tolerance of 0.049-0.068". Manufactured from carbon steel with black-oxide finish for enhanced protection. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and meets REACH (EC 1907/2006) requirements current as of January 17, 2023, including 233 SVHC substances. Designed specifically for use with No. 6 screw sizes in industrial and mechanical applications requiring reliable, corrosion-resistant fastening solutions.