S-95318A126 31.4 mm ID x 58.42 mm OD ASME B18.2.6M; ASTM F959 Tension-Indicating Structural Washers

Key Features & Benefits at a Glance

• Precise bolt tension verification through orange tension-indicating dye, ensuring accurate installation and preventing under/over-tightening
• Exceptional 326,000 N load capacity for maximum structural integrity in heavy-duty applications
• Superior corrosion resistance with galvanized steel construction, extending service life in harsh environments
• Reliable hardness performance with Rockwell C37 rating, maintaining dimensional stability under extreme pressure
• Standard-compliant manufacturing meeting ASME B18.2.6M and ASTM F959 specifications for consistent quality
• Environmental compliance assurance with RoHS 3 and REACH certification, meeting global regulatory requirements
• Optimized metric dimensions (31.4mm ID, 58.42mm OD) ensuring perfect fit with M30 fasteners in industrial assemblies

Professional Applications & Engineering Value

These M30 tension indicating washers provide critical engineering solutions for structural applications where bolt tension accuracy is paramount. The galvanized steel construction combined with Class 8.8 strength rating ensures reliable performance in heavy machinery, construction frameworks, and industrial equipment subjected to dynamic loads and vibration. The orange tension-indicating dye offers visual confirmation of proper installation, eliminating guesswork and preventing catastrophic failures in critical connections. Engineered to withstand extreme conditions while maintaining Rockwell C37 hardness, these washers deliver consistent performance in demanding environments including bridges, power generation facilities, and heavy manufacturing equipment where safety and reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to precise metric dimensions (31.4mm ID × 58.42mm OD × 4.000mm-7.000mm thickness) for M30 fastener applications. Complies with ASME B18.2.6M and ASTM F959 standards for dimensional accuracy and performance requirements. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards. The tension indication system provides verification at 326,000 N load capacity with Rockwell C37 hardness specification maintained throughout the product lifecycle.