S-91087A238 5/16"-18 x 1 3/4" Wood Screws
Wood 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
- Superior corrosion resistance with black-phosphate steel construction, ideal for demanding industrial environments
- Maximum torque transfer and reduced cam-out using T40 Torx drive for secure, efficient installation
- Excellent holding power in sheet metal and wood through thread-forming UNC coarse threading
- Clean, flush installation with standard flat head profile and 82° countersink angle
- Full-length threading ensures consistent grip and load distribution across the entire fastener length
- Simplified installation process with clearly specified H drill bit (0.266") for precise pilot holes
- Environmental compliance assurance meeting RoHS 3 and REACH standards for responsible sourcing
Professional Applications & Engineering Value
This 5/16"-18 thread forming wood screw delivers exceptional performance in sheet metal and wood applications where vibration resistance and long-term reliability are critical. The black-phosphate steel construction provides superior corrosion protection, extending service life in challenging environments. The T40 Torx drive system enables higher torque application without stripping, while the thread forming design creates strong, permanent threads in base materials without chip removal. The 82° countersink angle and flat head profile ensure flush mounting for safety and aesthetics, making these screws ideal for furniture manufacturing, structural wood assemblies, and metal framing applications requiring heavy-duty fastening solutions.
Specification Summary & Compliance
This fastener features UNC coarse threading (5/16"-18) with standard Class 2A tolerance for reliable engagement. The 1-3/4" length and fully threaded design provide maximum holding capacity. Manufactured to precise dimensional standards with 0.6" head diameter and 0.191" head height. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe and sustainable manufacturing practices. Requires H drill bit (0.266" diameter) for proper installation in thread-forming applications.
