S-91997A201 6-32 x 3/4" ASME B18.3 Sealing Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Tamper-resistant Torx drive prevents unauthorized access while ensuring secure installation in high-security applications.
• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish extends service life in harsh environments.
• Reliable pressure sealing up to 1500 psi using a Buna-N rubber O-ring that maintains integrity from -40° to 225°F.
• High tensile strength of 70,000 psi and Rockwell B70 hardness provide durable, vibration-resistant fastening.
• Precision Class 3A thread fit ensures consistent engagement and reduces the risk of cross-threading in assembly.
• Rounded button head design offers a low-profile, smooth finish that minimizes snagging and improves safety.
• Full threading and coarse UNC pattern enable quick installation and strong holding power in various materials.

Professional Applications & Engineering Value

This 6-32 x 3/4" rounded head screw is engineered to address critical challenges in industrial settings, such as vibration loosening and environmental exposure. The combination of 18-8 Stainless Steel and a passivated finish delivers exceptional resistance to rust and chemicals, making it ideal for outdoor equipment, marine hardware, and food processing machinery. The integrated Buna-N rubber O-ring creates a reliable seal against moisture, dust, and high-pressure fluids (up to 1500 psi), which is essential in hydraulic systems, pneumatic controls, and electronic enclosures. With its tamper-resistant Torx drive (T10 size), it also secures public infrastructure and sensitive devices from tampering, ensuring long-term operational safety and compliance with industry standards.

Specification Summary & Compliance

This screw features a UNC coarse thread with Class 3A fit for precise tolerance and easy assembly. It is fully threaded and right-hand oriented, with a maximum hole diameter of 0.151". Manufacturing and quality adhere to ASME B18.3 specifications, and the product is verified as RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting strict environmental and safety regulations for global industrial use.