S-91870A753 1/4"-20 x 1" ASME B18.3 Tamper-Resistant Torx Plus Stainless Steel Flat Head Screws
Tamper-Resistant Torx Plus Stainless 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 Security: Tamper-Resistant Torx Plus IPR30 drive prevents unauthorized removal, ideal for public or high-risk installations.
- Superior Corrosion Resistance: 18-8 Stainless Steel with passivated finish ensures long-term durability in harsh or outdoor environments.
- High Mechanical Strength: 70,000 psi tensile strength and Rockwell B70 hardness provide reliable performance under heavy loads.
- Precise Thread Engagement: Class 3A thread fit and UNC coarse threads ensure secure, vibration-resistant fastening.
- Full Thread Coverage: Fully threaded 1" length maximizes grip and load distribution across the entire fastener.
- Standardized Compatibility: Flat head with 82° countersink angle and ASME B18.3 compliance ensures easy integration into existing designs.
- Environmental Compliance: Meets RoHS 3 and REACH standards, making them suitable for regulated industries.
Professional Applications & Engineering Value
These 1/4-20 UNC flat head screws are engineered for applications where security and corrosion resistance are critical. The 18-8 stainless steel construction, combined with a passivated finish, effectively resists rust and chemical exposure, making them ideal for outdoor equipment, marine hardware, and chemical processing facilities. The tamper-resistant Torx Plus drive (IPR30) deters vandalism and unauthorized access in public infrastructure, transportation, and secure enclosures. With a Class 3A thread fit and coarse threading, they provide quick assembly and high vibration resistance, reducing maintenance needs in machinery and structural assemblies. Fully threaded for maximum holding power, these screws deliver consistent performance in industrial fastening applications requiring both reliability and compliance.
Specification Summary & Compliance
This screw features a 1/4"-20 UNC thread with Class 3A precision fit and coarse thread spacing for optimal engagement. Manufacturing adheres to ASME B18.3 specifications, ensuring dimensional accuracy and reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for use in environmentally conscious and regulated industries.
