S-98038A314 3.157" ID x 5.5" OD ASTM F436 Type 1 Structural Washers

Key Features & Benefits at a Glance

• Superior load distribution with 5.5" outer diameter to prevent surface damage and joint loosening under heavy loads
• Exceptional durability thanks to Rockwell C38 hardness steel construction that resists deformation and wear
• Precise compatibility with 3" screws through exact 3.157" inner diameter for secure, vibration-resistant fastening
• Certified reliability meeting ASTM F436 Type 1 specifications for consistent performance in structural applications
• Enhanced safety compliance with RoHS 3 and REACH environmental standards for worry-free industrial use
• Optimized thickness range (0.240-0.340") providing ideal compression and gap-filling capabilities
• Heavy-duty construction using inch-system steel washers engineered for demanding industrial environments

Professional Applications & Engineering Value

This ASTM F436 Type 1 steel flat washer delivers critical engineering solutions for heavy-load applications where standard washers fail. The Rockwell C38 hardness ensures exceptional resistance to embedding and deformation, while the generous 5.5" OD provides superior surface contact area to prevent joint loosening in vibrating machinery and structural steel connections. Engineered specifically for 3" screw size compatibility with its precise 3.157" inner diameter, this industrial-grade flat washer maintains bolt pre-load in construction equipment, bridge structures, and heavy machinery assemblies. The inch-system dimensions and steel material make it ideal for North American industrial standards where reliable load distribution is paramount for structural integrity and safety.

Specification Summary & Compliance

This heavy-duty flat washer features inch-system dimensions with 3.157" ID, 5.5" OD, and thickness ranging 0.240-0.340". Manufactured to ASTM F436 Type 1 specifications using steel material with Rockwell C38 hardness for structural applications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use in industrial and construction environments. Designed specifically for compatibility with 3" screw size fasteners in inch-measurement systems.