S-95318A117 1.31" ID x 2.51" OD ASME B18.2.6; ASTM F959 Type A325 Tension-Indicating Structural Washers

Key Features & Benefits at a Glance

• Visual tension confirmation with orange dye ensures proper installation and prevents under/over-tightening in critical connections
• Exceptional 81,000 lbs tension capacity delivers reliable performance in high-stress structural and industrial applications
• Galvanized steel construction provides superior corrosion resistance for extended service life in demanding environments
• Precision-engineered dimensions (1.31" ID, 2.51" OD) ensure perfect fit and optimal load distribution for 1 1/4" screw applications
• Rockwell C37 hardness rating maintains structural integrity under heavy loads and repeated stress cycles
• Comprehensive regulatory compliance with RoHS 3 and REACH standards guarantees environmental and safety adherence
• Industry-standard certification to ASME B18.2.6 and ASTM F959 Type A325 ensures consistent quality and interoperability

Professional Applications & Engineering Value

This tension indicating washer solves critical safety challenges in structural bolting applications where proper clamp load verification is essential. The galvanized steel construction combined with the orange tension-indicating dye provides dual protection against both corrosion and installation errors. Engineers specify these washers for heavy-duty industrial applications including structural steel connections, bridge construction, and heavy machinery assembly where the 81,000 lbs tension capacity ensures joint integrity. The precise dimensional control (1.31" ID for 1 1/4" screws) guarantees optimal load distribution while the Rockwell C37 hardness maintains performance through vibration and thermal cycling, making these industrial washers essential for safety-critical connections in construction and manufacturing environments.

Specification Summary & Compliance

This tension indicating washer features precise dimensional specifications with 1.31" inner diameter, 2.51" outer diameter, and thickness ranging from 0.158" to 0.270" for optimal performance with 1 1/4" screw sizes. Manufactured to exacting ASME B18.2.6 and ASTM F959 Type A325 standards, ensuring dimensional accuracy and mechanical properties. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest substance restriction requirements for industrial applications worldwide.