S-91997A208 8-32 x 3/4" ASME B18.3 Sealing Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel and passivated finish for long-lasting performance in harsh environments.
• Enhanced security and tamper resistance via the Torx T15 drive, preventing unauthorized access in sensitive applications.
• Reliable sealing under high pressure up to 1500 psi, thanks to the integrated Buna-N rubber O-ring that prevents leaks.
• Wide temperature tolerance from -40° to 225°F, ensuring consistent sealing and mechanical integrity in varied operating conditions.
• Precision threading and fit with UNC coarse threads and Class 3A fit for easy installation and secure, vibration-resistant connections.
• High tensile strength of 70,000 psi provides robust load-bearing capacity for demanding industrial assemblies.
• Rounded button head design offers a low-profile, smooth finish that reduces snagging and improves safety in assembled products.

Professional Applications & Engineering Value

This 8-32 x 3/4" rounded head screw is engineered to address critical challenges in industrial sealing and security. The 18-8 stainless steel construction, combined with a passivated finish, delivers exceptional resistance to corrosion and wear, making it ideal for outdoor, marine, or chemical-exposed settings. The integrated Buna-N rubber O-ring ensures a tight seal against fluids and gases, capable of withstanding pressures up to 1500 psi and temperatures from -40° to 225°F, which is vital for hydraulic systems, pneumatic equipment, and HVAC assemblies. The tamper-resistant Torx T15 drive adds a layer of security, preventing tampering in public infrastructure, electronics, and machinery. Fully threaded with a UNC coarse pattern and Class 3A fit, it ensures quick, precise installation and reliable performance in high-vibration applications, reducing maintenance needs and downtime.

Specification Summary & Compliance

This screw features precise UNC coarse threads with a Class 3A fit for accurate engagement and durability. It complies with ASME B18.3 standards for dimensional consistency and performance. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations for global industrial use.