S-94135A593 5/16"-18 x 2 1/2" ASME B18.6.3 Tamper-Resistant Drilled Spanner Stainless Steel Truss Head Screws
Tamper-Resistant Drilled Spanner Stainless Steel Truss 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
- Exceptional corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh industrial environments.
- Superior load distribution due to the wide rounded truss head design, reducing surface pressure and material damage.
- High tensile strength of 70,000 psi ensures reliable performance under heavy loads and vibration.
- Easy installation and removal with the drilled spanner drive (No. 14 size), providing secure tool engagement.
- Optimized thread engagement using 5/16"-18 UNC coarse threading and Class 2A fit for quick assembly and strong holding power.
- Enhanced durability with Rockwell B87 hardness, resisting wear and deformation over repeated use.
- Compliance with major standards including ASME B18.6.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
These 18-8 Stainless Steel rounded truss head screws are engineered to address common industrial fastening challenges, such as loosening under vibration and corrosion in demanding settings. The partially threaded design with coarse UNC threads allows for rapid installation and superior grip in materials like metal assemblies, machinery frames, and outdoor structures. The wide truss head distributes clamping force evenly, preventing surface damage and maintaining integrity in high-stress applications. With a drilled spanner drive, they offer secure tool access for tight spaces, making them ideal for industrial fasteners in construction, automotive, and marine sectors where reliability and corrosion resistance are critical.
Specification Summary & Compliance
This screw features precise Class 2A thread fit and UNC coarse threading (5/16"-18) with a minimum thread length of 1 1/2" and overall length of 2 1/2". Manufactured to ASME B18.6.3 specifications, it ensures dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and material integrity for global industrial use.
