S-90910A910 M1.8 x 3 mm ASME B18.3.4M Stainless Steel Button Head Torx Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
• Enhanced torque transmission through T5 Torx drive system, reducing cam-out risk and tool wear during installation
• High-strength performance delivering 100,000 psi tensile strength and Rockwell B96 hardness for demanding applications
• Precision thread engagement with Class 4g6g fit and coarse 0.35mm pitch ensuring reliable fastening in metric assemblies
• Low-profile rounded head design providing smooth surface finish while maintaining adequate drive engagement
• Full threading capability offering maximum grip length and uniform stress distribution along the entire 3mm length
• Regulatory compliance assurance meeting ASME B18.3.4M standards and environmental regulations for global industrial use

Professional Applications & Engineering Value

These M1.8 metric screws with Torx button head design address critical challenges in precision engineering applications where space constraints and corrosion resistance are paramount. The combination of 18-8 stainless steel and passivated finish provides exceptional protection against oxidation and chemical exposure, making them ideal for electronics, medical devices, and instrumentation. The T5 drive system prevents stripping commonly associated with smaller fasteners, while the Class 4g6g thread fit ensures consistent performance in vibration-prone environments. The fully threaded construction maximizes holding power in thin materials, and the rounded head profile minimizes protrusion in compact assemblies. These characteristics make them particularly valuable in aerospace components, precision optical equipment, and miniature mechanical systems where reliability and dimensional accuracy are critical.

Specification Summary & Compliance

Manufactured to precise metric dimensions with M1.8 thread size, 0.35mm pitch, and 3mm length. Thread specifications conform to Class 4g6g tolerance standards for consistent fit and performance. Compliant with ASME B18.3.4M manufacturing specifications, ensuring dimensional accuracy and mechanical properties. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming restriction of hazardous substances. Features right-hand coarse threading and fully threaded design for optimal installation efficiency and load distribution.