S-90388A128 M8 x 20 mm ASME B18.3.4M, ISO 7380 Tamper-Resistant Torx Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized Torx T40 drive design to prevent unauthorized access in secure installations
• Superior corrosion protection through black-oxide coating on alloy steel, extending service life in demanding environments
• Optimized thread engagement with Class 6g coarse threading ensuring reliable fastening in various materials
• High-strength performance delivering 130,000 PSI tensile strength for critical load-bearing applications
• Secure rounded head profile providing smooth finished appearance while maintaining tamper-resistant properties
• Consistent dimensional accuracy with fully threaded M8x1.25mm design for uniform clamping force distribution
• Industry-standard compliance meeting ASME B18.3.4M and ISO 7380 specifications for guaranteed interoperability

Professional Applications & Engineering Value

These M8 metric screws with tamper-resistant Torx drive address critical security and reliability challenges in industrial settings. The black-oxide alloy steel construction provides exceptional corrosion resistance for machinery, electrical enclosures, and outdoor equipment where environmental factors degrade ordinary fasteners. The coarse thread pitch (1.25mm) ensures rapid installation and superior holding power in softer materials like aluminum housings or plastic components. With fully threaded design and Class 6g thread fit, these rounded head screws maintain consistent clamping force across the entire fastener length, preventing loosening from vibration in automotive assemblies, industrial controls, and public infrastructure applications where maintenance access must be controlled.

Specification Summary & Compliance

Manufactured to precise metric dimensions with M8 thread size, 1.25mm pitch, and 20mm length. Threads conform to Class 6g tolerance per ISO standards with coarse thread spacing. Meets ASME B18.3.4M and ISO 7380 manufacturing specifications. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no substances of very high concern as of the latest compliance verification.