S-91900A659 3/8"-16 x 1 1/2" ASME B18.3 Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Enhanced tamper resistance with specialized Torx T45 drive that deters unauthorized access while providing secure installation
• Superior corrosion protection through 18-8 stainless steel construction and passivated surface treatment for extended service life
• Reliable thread engagement with Class 3A thread fit ensuring precise, vibration-resistant fastening in demanding applications
• High-strength performance delivering 70,000 psi tensile strength and Rockwell B70 hardness for heavy-duty industrial use
• Optimized head design featuring rounded button profile that provides smooth surface finish while accommodating standard wrenching
• Full-threaded coverage along the 1-1/2" length enables maximum grip and load distribution across connected materials
• Regulatory compliance meeting ASME B18.3 specifications and environmental standards including RoHS 3 and REACH

Professional Applications & Engineering Value

Engineered for high-security industrial applications, these 18-8 stainless steel tamper-resistant Torx screws address critical challenges in public infrastructure, machinery guarding, and access control systems. The combination of passivated finish and stainless steel material provides exceptional resistance to corrosion, moisture, and chemical exposure, extending maintenance intervals in harsh environments. The T45 tamper-resistant Torx drive prevents unauthorized removal while allowing controlled access for authorized personnel using specialized tools. With UNC coarse threads and Class 3A thread fit, these fully threaded rounded head screws ensure rapid installation and reliable performance in vibration-prone applications, making them ideal for securing panels, enclosures, and equipment where tampering prevention and long-term reliability are paramount.

Specification Summary & Compliance

This 3/8"-16 x 1-1/2" security screw features precision Class 3A thread fit with UNC coarse threading and right-hand thread direction. Manufacturing complies with ASME B18.3 specifications for dimensional accuracy and performance standards. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and material safety. Mechanical properties include 70,000 psi tensile strength and Rockwell B70 hardness, validating its suitability for high-stress industrial fastening applications.