S-91280A045 M4 x 20 mm ISO 4017, DIN 933 Medium-Strength Metric Class 8.8 Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior load-bearing capacity with Class 8.8 strength grade and 110,000 psi tensile strength for reliable performance in demanding applications
• Exceptional durability thanks to Rockwell C21 hardness steel construction that resists wear and deformation
• Quick and secure installation with external hex drive design providing positive tool engagement and efficient assembly
• Optimal thread engagement with Class 6g thread fit and coarse thread spacing for faster installation and vibration resistance
• Complete thread coverage along the 20mm length ensures maximum grip strength and uniform stress distribution
• Corrosion-resistant black finish enhances longevity while maintaining professional appearance in industrial environments
• Global compliance assurance meeting ISO 4017 DIN 933 standards plus RoHS 3 and REACH environmental regulations

Professional Applications & Engineering Value

These M4 hex head screws deliver exceptional engineering value in industrial assembly applications where high tensile strength and reliable fastening are critical. The Class 8.8 steel construction provides the necessary durability for machinery, equipment manufacturing, and structural applications where vibration resistance and long-term performance are essential. The metric coarse thread design with Class 6g tolerance ensures quick installation while maintaining precise fit, reducing assembly time without compromising joint integrity. The fully threaded configuration offers maximum holding power across the entire 20mm length, making these hex head fasteners ideal for applications requiring uniform clamping force. The black steel finish provides additional corrosion protection, extending service life in challenging industrial environments while maintaining compliance with international environmental standards.

Specification Summary & Compliance

This M4 x 0.7 x 20mm hex head screw features precise Class 6g thread fit according to metric standards with coarse thread spacing for optimal performance. Manufactured to ISO 4017 DIN 933 specifications, these fasteners ensure dimensional accuracy and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, meeting the latest substance restriction requirements for industrial applications across global markets.