S-91087A136 1/4"-20 x 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
- Enhanced torque transmission and reduced cam-out thanks to T30 Torx drive design for reliable installation
- Secure fastening in sheet metal and wood with UNC coarse threading that provides excellent holding power
- Optimized for pre-drilled applications using No. 3 drill bit (0.213" diameter) for precise, clean installations
- Flush mounting capability with standard 82° flat head profile that sits neatly in countersunk holes
- Reduced material stress through thread forming design that creates strong threads without cutting
- Compliance with environmental regulations including RoHS 3 and REACH for global industrial use
Professional Applications & Engineering Value
These 1/4"-20 thread forming wood screws deliver exceptional performance in demanding 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 T30 Torx drive system ensures maximum torque transfer during installation, minimizing fastener damage and improving assembly efficiency. With UNC coarse threading and partial threading design, these screws offer superior pull-out resistance while reducing the risk of material splitting. The 82° countersink angle and flat head profile create clean, professional finishes in industrial woodworking and metal fabrication projects.
Specification Summary & Compliance
Manufactured to precise dimensional standards with 1/4"-20 UNC coarse threads and right-hand thread direction. Features 4" length with 1 1/2" minimum thread length and standard flat head profile. Designed for use with No. 3 drill bit (0.213" diameter) and 82° countersink angle. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in industrial applications worldwide.
