S-98038A115 2.907" ID x 5" OD ASTM F436 Type 1 Structural Washers

Key Features & Benefits at a Glance

• Enhanced load distribution with 5" outer diameter to prevent surface damage and joint loosening under heavy loads
• Superior hardness protection with Rockwell C38 rating to resist deformation and maintain clamping force integrity
• Precision dimensional fit with 2.907" inner diameter ensuring perfect alignment with 2 3/4" screw sizes
• Industry-standard compliance meeting ASTM F436 Type 1 specifications for consistent quality and performance
• Robust material durability using hardened steel construction for long service life in demanding environments
• Regulatory safety assurance with REACH compliance for environmentally responsible industrial applications
• Versatile thickness range from 0.240" to 0.340" providing flexibility for various assembly requirements

Professional Applications & Engineering Value

This ASTM F436 Type 1 flat washer delivers critical engineering solutions for heavy-duty industrial applications where load distribution and joint integrity are paramount. The hardened steel construction with Rockwell C38 hardness prevents embedding and surface damage in structural connections, while the precise 2.907" ID ensures perfect fitment with 2 3/4" screws without play or misalignment. The 5" OD provides maximum bearing surface area, effectively distributing clamp load across wider surfaces to prevent material crushing in soft substrates or gasketed joints. These industrial washers are engineered to maintain bolt preload in vibrating machinery, structural steel connections, and heavy equipment assemblies where standard washers would deform under extreme pressure. The inch system compatibility makes them ideal for North American industrial standards and retrofit applications.

Specification Summary & Compliance

This hardened steel flat washer features precise dimensional specifications with 2.907" inner diameter, 5" outer diameter, and thickness ranging 0.240-0.340". Manufactured to ASTM F436 Type 1 standards for hardened steel washers, it maintains Rockwell C38 hardness for consistent performance. The product is fully REACH compliant (EC 1907/2006) as of June 14, 2023, containing no Substances of Very High Concern among the 235 listed SVHCs, ensuring regulatory compliance for industrial use across various sectors.