S-91294A473 M2.5 x 4 mm DIN 7991, ISO 10642 Alloy Steel Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Exceptional tensile strength with Class 10.9 rating and 120,000 psi capability for reliable performance in high-stress industrial environments.
• Superior corrosion resistance from the black-oxide alloy steel material, extending service life in harsh or humid conditions.
• Precise metric threading with M2.5 x 0.45 mm coarse pitch and Class 6g fit for easy installation and secure, vibration-resistant fastening.
• Optimized drive efficiency thanks to the 1.5 mm hex drive and flat head design, allowing flush mounting and reduced risk of stripping.
• Enhanced durability with Rockwell C32 hardness, ensuring the screw maintains integrity under repetitive loads and wear.
• Full regulatory compliance including RoHS 3 and REACH, making it safe for various industries and global supply chains.
• Versatile fully threaded design for uniform load distribution and consistent grip across the entire length in assembled components.

Professional Applications & Engineering Value

This M2.5 flat head screw is engineered to address common industrial challenges such as component loosening due to vibration and corrosion-induced failure. Crafted from black-oxide alloy steel, it offers robust protection against rust and wear, ideal for machinery, automotive assemblies, and electronic enclosures exposed to demanding conditions. The Class 10.9 strength grade and coarse metric thread with a 0.45 mm pitch ensure quick, secure fastening, reducing assembly time while providing high clamp force. Its fully threaded right-hand design and hex drive facilitate easy installation with standard tools, minimizing the risk of head damage and enhancing reliability in heavy-duty applications where precision and long-term performance are critical.

Specification Summary & Compliance

This screw adheres to precise dimensional standards with a Class 6g thread fit and M2.5 x 0.45 mm coarse thread spacing, ensuring compatibility with metric components. It meets DIN 7991 and ISO 10642 specifications for flat head screws, guaranteeing consistent quality and performance. Additionally, it is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in environmentally sensitive and regulated industries.