S-91870A280 5/16"-18 x 1" ASME B18.3 Tamper-Resistant Torx Stainless Steel Flat Head Screws
Tamper-Resistant Torx 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
- Tamper-Resistant Security: T40 Torx drive prevents unauthorized removal, ideal for public or high-security installations.
- Superior Corrosion Resistance: 18-8 Stainless Steel with passivated finish ensures long-term durability in harsh environments.
- High Tensile Strength: 70,000 psi tensile strength and Rockwell B70 hardness provide reliable, vibration-resistant fastening.
- Optimized Holding Power: Fully threaded UNC coarse thread design offers maximum grip and load distribution.
- Precision Thread Fit: Class 2A thread fit ensures smooth installation and consistent performance.
- Flush Mounting: Standard flat head with 82° countersink angle allows for a smooth, unobtrusive surface finish.
- Regulatory Compliance: Meets ASME B18.3 standards and is RoHS 3/REACH compliant for safe, global industrial use.
Professional Applications & Engineering Value
Engineered for demanding environments, these 5/16"-18 UNC flat head screws address critical industrial challenges. The 18-8 Stainless Steel construction and passivated finish combat corrosion in outdoor, marine, or chemical-exposed settings, reducing maintenance costs. The tamper-resistant Torx (T40) drive enhances security in public infrastructure, machinery, and electronic enclosures, preventing vandalism. With a coarse thread and fully threaded design, they ensure rapid installation and superior pull-out resistance in wood, metal, and composite materials, making them ideal for assembly lines and structural applications where reliability is non-negotiable.
Specification Summary & Compliance
This screw features a Class 2A thread fit per UNC standards, ensuring precise dimensional accuracy and compatibility. Manufacturing adheres to ASME B18.3 specifications for consistent quality. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing the absence of hazardous substances for safe use in global markets.
