S-95318A121 16.7 mm ID x 33.6 mm OD ASME B18.2.6M; ASTM F959 Tension-Indicating Structural Washers

Key Features & Benefits at a Glance

• Visual tension verification through bright orange dye provides immediate confirmation of proper bolt preload, eliminating guesswork and reducing installation errors.
• High-strength Class 8.8 performance ensures reliable load-bearing capacity and structural integrity in demanding industrial applications.
• Corrosion-resistant galvanized steel construction extends service life and maintains performance in harsh or outdoor environments.
• Precise 91,000 N tension indication delivers accurate and consistent bolt tension control for critical bolted connections.
• Optimized metric dimensions (16.7mm ID, 33.6mm OD) ensure perfect compatibility with M16 bolts and uniform load distribution.
• Compliance with major industry standards including ASME B18.2.6M and ASTM F959 guarantees consistent quality and engineering reliability.
• Environmental regulation compliance with RoHS 3 and REACH standards ensures safe use and global market acceptance.

Professional Applications & Engineering Value

This M16 tension indicating washer solves critical engineering challenges in applications where precise bolt tension is paramount. The Class 8.8 galvanized steel construction provides exceptional strength and corrosion resistance for heavy-duty machinery, structural steel connections, and industrial equipment. The innovative orange tension-indicating dye offers visual confirmation that specified preload (91,000 N) has been achieved, preventing both under-tightening (which causes joint failure) and over-tightening (which damages threads). This metric tension washer is particularly valuable in construction, energy infrastructure, and manufacturing where precision bolting directly impacts safety, maintenance intervals, and operational reliability. The standardized dimensions ensure seamless integration with existing M16 fastener systems while the surface treatment maintains performance in challenging environmental conditions.

Specification Summary & Compliance

This tension indicating washer features precise dimensional specifications with 16.7mm inner diameter and 33.6mm outer diameter, manufactured from Class 8.8 galvanized steel with Rockwell C37 hardness. The product complies with ASME B18.2.6M and ASTM F959 manufacturing standards, ensuring consistent performance and dimensional accuracy. Environmental compliance is confirmed through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) certifications, making it suitable for global industrial applications requiring regulated material compliance.