S-91358A501 0.52" ID x 1.073" OD ASME B18.2.6; ASTM F959 Type A490 Tension-Indicating Structural Washers

Key Features & Benefits at a Glance

• Visual load verification through orange tension-indicating dye, enabling quick inspection and ensuring proper bolt tension in critical applications
• Exceptional 15,000 lbs load capacity provides reliable performance in high-stress structural connections and heavy machinery assemblies
• Premium steel construction with Rockwell C37 hardness delivers superior durability and resistance to deformation under extreme pressure
• Precision dimensional control with 0.52" ID and 1.073" OD ensures perfect fit for 1/2" screws and consistent installation performance
• Dual compliance with ASME B18.2.6 and ASTM F959 Type A490 standards guarantees engineering reliability for structural and construction applications
• Full regulatory compliance with RoHS 3 and REACH environmental standards meets international manufacturing requirements
• Variable thickness design (0.104-0.180") accommodates different compression needs while maintaining tension indication accuracy

Professional Applications & Engineering Value

This tension indicating washer solves critical safety concerns in structural steel connections, heavy equipment assembly, and construction applications where proper bolt tension is essential for structural integrity. The steel construction with Rockwell C37 hardness prevents deformation under extreme loads, while the orange tension-indicating dye provides immediate visual confirmation of proper installation. Engineered specifically for 1/2" screws in inch system applications, this washer eliminates guesswork in critical bolted joints, reducing the risk of structural failures in bridges, industrial machinery, and building frameworks. The combination of high-strength material and precise dimensional control ensures consistent performance in demanding environments where safety and reliability are paramount.

Specification Summary & Compliance

This tension indicating washer features precise dimensional specifications with 0.52" ID, 1.073" OD, and thickness ranging from 0.104" to 0.180" for optimal compression performance. Manufactured to meet ASME B18.2.6 and ASTM F959 Type A490 standards, ensuring dimensional accuracy and mechanical properties for structural applications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest international standards for hazardous substance restrictions and chemical safety in industrial components.