S-91870A768 1/4"-20 x 5/8" ASME B18.3 Tamper-Resistant Torx Steel Flat Head Screws
Tamper-Resistant Torx Steel Flat 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
- Enhanced tamper resistance with Torx T30 drive prevents unauthorized removal in high-security environments
- Superior corrosion protection through black oxide finish extends service life in demanding industrial conditions
- Exceptional mechanical strength with 160,000 psi tensile strength and Rockwell C38 hardness for heavy-duty applications
- Precise thread engagement with Class 3A UNC coarse threads ensures reliable fastening performance
- Optimized flush mounting featuring 82° countersink angle and standard flat head profile for seamless surface integration
- Full regulatory compliance meeting ASME B18.3 standards, RoHS 3, and REACH for global industrial acceptance
- Complete threading coverage along the 5/8" length provides maximum grip and load distribution
Professional Applications & Engineering Value
Engineered for critical security applications and heavy-duty industrial assemblies, these flat head screws address the dual challenges of unauthorized access prevention and structural integrity. The alloy steel construction with black oxide finish delivers exceptional resistance to corrosion and wear in harsh environments, while the tamper-resistant Torx T30 drive system prevents tampering in public facilities, machinery, and electronic enclosures. The Class 3A thread fit and UNC coarse threading ensure rapid installation and vibration resistance, making them ideal for manufacturing equipment, security systems, and industrial machinery where reliability and protection against vandalism are paramount.
Specification Summary & Compliance
This 1/4"-20 x 5/8" flat head screw features precision Class 3A thread fit with UNC coarse threads and 82° countersink angle for optimal flush mounting. Manufactured to ASME B18.3 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and international acceptance. The fully threaded design and right-hand thread direction provide consistent fastening performance across industrial applications.
