S-91900A549 1/4"-20 x 2" ASME B18.3 Tamper-Resistant Torx Stainless Steel Button Head Screws

Key Features & Benefits at a Glance

• Tamper-resistant T27 drive prevents unauthorized removal, enhancing equipment security in public or high-risk environments
• 18-8 stainless steel construction provides excellent corrosion resistance and durability for long service life in harsh conditions
• Passivated surface finish significantly improves corrosion protection while maintaining clean appearance
• Class 3A thread fit ensures precise, tight engagement with mating components for reliable fastening performance
• 70,000 psi tensile strength and Rockwell B70 hardness deliver exceptional mechanical performance under heavy loads
• Fully threaded design allows maximum grip length and adjustment flexibility throughout the entire fastener
• Rounded button head profile offers a low-profile installation with smooth, finished appearance

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 specialized T27 drive system prevents casual tampering while allowing authorized maintenance with proper tools. The passivated finish on the stainless steel substrate provides superior corrosion resistance in demanding environments, from manufacturing facilities to outdoor installations. With UNC coarse threading and Class 3A thread fit, these fully threaded screws ensure rapid installation and reliable engagement in various materials. The combination of 70,000 psi tensile strength and rounded head design makes them ideal for applications requiring both security and durability without sharp edges that could cause injury.

Specification Summary & Compliance

This 1/4"-20 x 2" tamper-resistant Torx rounded head screw features UNC coarse threading with precision Class 3A thread fit for optimal engagement. Manufacturing and dimensional specifications comply with ASME B18.3 standards, ensuring consistent quality and interchangeability. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) compliance for chemical safety, making them suitable for regulated industrial applications worldwide.