S-95635A264 4-40 x 3/4" ASME B18.3 Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws
Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Tamper-resistant hex drive prevents unauthorized removal, enhancing security in public or sensitive equipment applications
- 18-8 stainless steel construction provides excellent corrosion resistance for long-lasting performance in harsh environments
- Class 3A thread fit ensures precise, reliable engagement with consistent clamping force in critical assemblies
- 70,000 psi tensile strength delivers high load-bearing capacity for demanding mechanical applications
- Passivated finish enhances corrosion protection while maintaining surface integrity and appearance
- Rounded button head design offers a low-profile, smooth finish that reduces snagging and improves safety
- Full compliance with ASME B18.3, RoHS 3, and REACH guarantees industry-standard quality and environmental safety
Professional Applications & Engineering Value
This 4-40 UNC 3/4" tamper-resistant rounded head screw is engineered to address critical challenges in industrial and commercial settings where security and durability are paramount. The 18-8 stainless steel material combined with a passivated finish provides superior resistance to corrosion, making it ideal for outdoor equipment, marine applications, and chemical processing environments. The tamper-resistant hex drive ensures that fasteners remain securely in place, preventing vandalism or unauthorized access in public infrastructure, electronic enclosures, and machinery. With a coarse thread spacing and Class 3A thread fit, it offers quick installation and reliable performance in high-vibration applications, reducing maintenance needs and downtime. This screw is a trusted solution for engineers seeking robust, compliant fastening that meets rigorous industry standards.
Specification Summary & Compliance
This screw features precise Class 3A thread fit per UNC standards, ensuring tight tolerances for secure fastening. It is manufactured in compliance with ASME B18.3 specifications, guaranteeing dimensional accuracy and performance reliability. The product fully adheres to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its environmental and safety compliance for global industrial use.
