S-95635A260 4-40 x 3/16" ASME B18.3 Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws
Tamper-Resistant Hex-Drive Stainless Steel Button Head Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Enhanced tamper resistance with specialized hex drive design prevents unauthorized removal in secure environments
- Superior corrosion resistance through 18-8 stainless steel construction and passivated surface treatment
- Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B70 hardness for demanding applications
- Precision thread engagement with Class 3A fit and UNC coarse threading ensures reliable fastening performance
- Optimized head design featuring rounded button profile provides smooth surface finish and reduced snagging
- Full regulatory compliance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH
- Complete thread coverage with fully threaded design maximizes grip strength across the entire fastener length
Professional Applications & Engineering Value
These 4-40 UNC thread rounded head screws deliver critical security and durability in industrial applications where tampering prevention and environmental resistance are paramount. The combination of 18-8 stainless steel material and passivated finish provides exceptional protection against corrosion in harsh operating conditions, while the tamper-resistant hex drive ensures equipment security in public access areas, electronic enclosures, and machinery protection systems. The Class 3A thread fit with coarse thread spacing enables rapid installation and reliable performance in vibration-prone environments, making these security screws ideal for manufacturing equipment, telecommunications infrastructure, and transportation applications where maintenance access must be controlled.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 3A thread fit and UNC thread form ensuring consistent performance across applications. Complies with ASME B18.3 specifications for dimensional accuracy and mechanical properties. Meets environmental regulations including RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) requirements, confirming suitability for global industrial markets and restricted substance regulations.
