S-95348A117 1.31" ID x 2.51" OD ASME B18.2.6; ASTM F959 Type A490 Tension-Indicating Structural Washers

Key Features & Benefits at a Glance

• Visual tension confirmation with bright orange dye that clearly indicates proper bolt preload, reducing installation errors and inspection time
• Exceptional load capacity of 102,000 lbs tension ensures reliable performance in critical structural and heavy machinery applications
• Premium zinc-plated steel construction provides excellent corrosion resistance and durability in harsh industrial environments
• Precision dimensional control with 1.31" ID and 2.51" OD ensures perfect fit for 1 1/4" screws and uniform load distribution
• Consistent hardness rating of Rockwell C37 guarantees mechanical stability and prevents deformation under extreme loads
• Full regulatory compliance with RoHS 3 and REACH standards ensures environmental safety and global market acceptance
• Industry-standard certification meeting ASME B18.2.6 and ASTM F959 Type A490 specifications for guaranteed quality and interoperability

Professional Applications & Engineering Value

This tension indicating washer solves critical engineering challenges in structural bolting applications where proper clamp load is essential for safety and performance. The zinc-plated steel construction combined with the orange tension-indicating dye provides a reliable visual verification system that eliminates guesswork during installation. Engineers specify these washers for heavy-duty industrial applications including structural steel connections, bridge construction, and heavy machinery assembly where the 102,000 lbs tension capacity ensures joint integrity. The precise dimensional tolerances and Rockwell C37 hardness prevent compression set and maintain consistent performance even under vibration and dynamic loading conditions, making them ideal for critical structural connections requiring verified preload.

Specification Summary & Compliance

This tension indicating washer features precise dimensional specifications with 1.31" inner diameter, 2.51" outer diameter, and 0.158-0.280" thickness range, designed specifically for 1 1/4" screw applications. The product fully complies with ASME B18.2.6 and ASTM F959 Type A490 manufacturing standards, ensuring dimensional accuracy and performance reliability. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) requirements, confirming environmental safety and material restrictions adherence for global industrial use.