S-90991A121 M4 x 8 mm ISO 7380 Stainless Steel Button Head Torx Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish, ideal for harsh environments.
• Enhanced torque transfer and reduced cam-out thanks to the T20 Torx drive design.
• Reliable fastening in various materials with a coarse thread pitch and Class 6g fit for quick assembly.
• High mechanical strength offering a tensile strength of 100,000 psi for demanding applications.
• Consistent flush mounting with a low-profile, rounded button head design.
• Full-length threading ensures maximum grip and holding power along the entire shank.
• Global compliance and safety meeting ISO 7380, RoHS 3, and REACH standards.

Professional Applications & Engineering Value

This M4 metric screw is engineered for precision and durability in industrial settings. The 18-8 Stainless Steel construction, combined with a passivated finish, provides excellent resistance to oxidation and chemical exposure, making it suitable for automotive, electronics, and machinery assembly. The T20 Torx drive ensures efficient torque application, minimizing tool slippage and damage to the fastener. With a coarse thread pitch and Class 6g tolerance, it offers quick installation and secure fastening in metals and plastics, reducing assembly time and improving production line efficiency. Its fully threaded design and rounded head profile allow for a clean, flush finish in applications where protrusion is a concern.

Specification Summary & Compliance

This screw adheres to ISO 7380 standards, ensuring dimensional accuracy and interchangeability. The metric thread features a size of M4 x 0.7 mm with a Class 6g fit for precise thread engagement. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing the use of safe, environmentally responsible materials. The right-hand thread direction and coarse spacing further support reliable performance in various industrial applications.