S-91997A196 6-32 x 5/16" 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, ensuring long-term reliability in harsh environments.
• Enhanced security and tamper resistance via the Torx T10 drive, preventing unauthorized access in sensitive applications.
• Reliable high-pressure sealing up to 1500 psi, thanks to the integrated Buna-N rubber O-ring that maintains integrity from -40° to 225°F.
• Precise thread engagement and durability with Class 3A UNC coarse threads, providing a secure fit and reducing cross-threading risks.
• Consistent performance under vibration due to fully threaded design and rounded button head, minimizing loosening in dynamic industrial settings.
• Broad temperature compatibility with O-rings that function across extreme ranges, ideal for automotive, HVAC, and outdoor equipment.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This 6-32 UNC sealing screw is engineered to address critical challenges in industrial assemblies where leakage and tampering are concerns. The 18-8 Stainless Steel construction, combined with a passivated finish, resists corrosion in moist or chemical-exposed environments, extending service life. The tamper-resistant Torx T10 drive enhances security for public infrastructure, electronics, and machinery, while the Buna-N rubber O-ring ensures a tight seal against fluids and gases up to 1500 psi. Its fully threaded design and Class 3A thread fit provide consistent clamping force, reducing maintenance in vibrating systems like pumps, compressors, and automotive components. Ideal for OEMs and MRO professionals, this rounded head screw delivers reliability in sealing applications across manufacturing, energy, and transportation sectors.

Specification Summary & Compliance

This screw features a 6-32 UNC coarse thread with Class 3A fit for precise dimensional accuracy, ensuring reliable fastening. It is manufactured in accordance with ASME B18.3 specifications and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming adherence to environmental and safety standards. The passivated finish on 18-8 Stainless Steel enhances corrosion resistance, supporting use in regulated industries.