S-91294A204 M4 x 40 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional load-bearing capacity with Class 10.9 strength rating and 120,000 psi tensile strength for reliable performance in demanding applications
• Superior corrosion resistance through black-oxide surface treatment, extending service life in harsh industrial environments
• Precision installation and removal with 2.5mm hex drive design, preventing tool slippage and damage to fastener heads
• Optimal flush mounting with standard 90° countersink angle and flat head profile for seamless integration into assembled components
• Enhanced thread engagement through fully threaded M4 x 0.7mm coarse pitch design, providing maximum holding power across the entire length
• Consistent dimensional accuracy with Class 6g thread fit tolerance, ensuring reliable mating with corresponding nuts and threaded holes
• Industry-standard compliance meeting DIN 7991/ISO 10642 specifications for guaranteed interchangeability and performance

Professional Applications & Engineering Value

Engineered for high-stress industrial applications, these M4 flat head screws deliver exceptional mechanical performance where reliability is paramount. The black-oxide alloy steel construction provides superior corrosion resistance while maintaining Rockwell C32 hardness for excellent wear resistance. The fully threaded metric screw design with coarse 0.7mm pitch ensures rapid installation and maximum thread engagement in various materials. The 90° countersink angle and flat head profile create flush surfaces critical for machinery, automotive assemblies, and industrial equipment where protrusions could interfere with operation. The 2.5mm hex drive facilitates secure tool engagement, reducing installation time and preventing fastener damage in high-volume production environments.

Specification Summary & Compliance

This 40mm length metric screw features precise Class 6g thread fit tolerance and M4 x 0.7mm coarse pitch threading manufactured to DIN 7991/ISO 10642 standards. The fastener meets Class 10.9 strength requirements with verified 120,000 psi tensile strength and Rockwell C32 hardness. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence for global industrial applications.