S-90910A960 M4.5 x 8 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, ideal for harsh environments and extending service life.
• Enhanced torque transmission and strip-resistance provided by the T20 Torx drive, ensuring secure fastening and reducing tool wear.
• High mechanical strength and durability with a tensile strength of 100,000 psi and Rockwell B96 hardness for reliable performance under load.
• Optimized for quick and easy installation thanks to the coarse 0.75 mm pitch and fully threaded M4.5 design, reducing assembly time.
• Precise and secure thread engagement ensured by the Class 4g6g thread fit, minimizing the risk of cross-threading and loosening.
• Low-profile, rounded button head design offers a finished appearance and reduces snagging in compact assemblies.
• Guaranteed quality and material safety through compliance with ASME B18.3.4M, RoHS 3, and REACH standards.

Professional Applications & Engineering Value

This M4.5 x 0.75 mm metric screw is engineered to address critical challenges in precision assembly. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to oxidation and chemical exposure, making it suitable for electronics, automotive, and medical device applications where corrosion can compromise integrity. The T20 Torx drive delivers higher torque transfer compared to traditional drives, reducing cam-out and preventing damage to the screw head during high-stress installations. With a coarse thread and fully threaded shank, it ensures rapid engagement and strong holding power in metals and plastics, streamlining production lines and enhancing joint reliability in industrial fastening scenarios.

Specification Summary & Compliance

This screw features a Metric M4.5 thread with a 0.75 mm coarse pitch and Class 4g6g thread fit for precise dimensional accuracy. It is manufactured in compliance with the ASME B18.3.4M standard, ensuring consistent quality and interchangeability. The product is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming adherence to environmental and safety regulations for hazardous substances.