S-91294A558 M18 x 40 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide coating for extended service life in harsh industrial environments
• Exceptional load-bearing capacity thanks to Class 10.9 high-strength alloy steel construction
• Reliable fastening performance with fully threaded coarse pitch design for quick installation and vibration resistance
• Precise flush mounting achieved through standard 90° countersink angle and flat head profile
• High-torque installation capability with 12mm hex drive for secure tightening without stripping
• Consistent dimensional accuracy maintained through Class 6g thread fit for reliable mating with components
• Global compliance assurance meeting RoHS 3 and REACH environmental regulations for international projects

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these M18 flat head screws deliver exceptional performance in machinery assembly, structural frameworks, and heavy equipment manufacturing. The black-oxide alloy steel construction provides superior protection against corrosion while maintaining the Class 10.9 strength rating critical for high-stress connections. The fully threaded coarse pitch design ensures maximum thread engagement and resistance to vibration loosening, while the standard flat head profile with 90° countersink enables seamless flush mounting in precision applications. Manufactured to DIN 7991/ISO 10642 standards, these metric screws offer reliable interoperability in global engineering projects requiring consistent dimensional accuracy and performance predictability.

Specification Summary & Compliance

This high-strength metric screw features M18 x 2.5mm coarse thread with Class 6g thread fit tolerance ensuring precise mating with standard nuts and threaded components. The fastener meets DIN 7991/ISO 10642 manufacturing specifications for dimensional consistency and performance reliability. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations ensures suitability for international industrial applications requiring strict material restrictions. The Class 10.9 strength classification guarantees minimum tensile strength of 120,000 psi with Rockwell C32 hardness for demanding mechanical applications.