S-91358A504 0.915" ID x 1.76" OD ASME B18.2.6; ASTM F959 Type A490 Tension-Indicating Structural Washers

Key Features & Benefits at a Glance

• Reliable tension verification through orange dye coating that provides clear visual confirmation of proper bolt preload
• High load capacity with 49,000 lbs tension indication capability for demanding industrial applications
• Exceptional durability with Rockwell C37 hardness ensuring long-term performance under heavy loads
• Precision dimensional accuracy with 0.915" ID and 1.76" OD for perfect fit with 7/8" screws
• Industry-standard compliance meeting ASME B18.2.6 and ASTM F959 Type A490 specifications
• Environmental responsibility with RoHS 3 and REACH compliance for global regulatory acceptance
• Variable thickness accommodation (0.158-0.260") allowing for precise tension adjustment in various assembly scenarios

Professional Applications & Engineering Value

This tension indicating washer delivers critical engineering value in applications where precise bolt tension is paramount to structural integrity and safety. The steel construction with Rockwell C37 hardness ensures reliable performance in heavy-duty industrial environments, from structural steel connections to heavy machinery assembly. The orange tension-indicating dye provides immediate visual confirmation when proper preload is achieved, eliminating guesswork and preventing both under-tightening (which can lead to joint failure) and over-tightening (which can damage components). Engineered specifically for 7/8" screw applications in the inch measurement system, this washer serves as an essential quality control component in construction, manufacturing, and infrastructure projects where certified performance according to ASME B18.2.6 and ASTM F959 Type A490 standards is required.

Specification Summary & Compliance

This tension indicating washer features precise dimensional specifications including 0.915" ID, 1.76" OD, and thickness range of 0.158-0.260" for 7/8" screw applications. Manufactured from high-strength steel with Rockwell C37 hardness, the washer provides 49,000 lbs tension indication capacity. The product fully complies with ASME B18.2.6 and ASTM F959 Type A490 standards, ensuring dimensional accuracy and performance reliability. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, making it suitable for global industrial applications requiring certified quality and regulatory adherence.