S-91087A132 1/4"-20 x 2 1/2" Wood Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-phosphate steel coating for extended service life in demanding environments
• Enhanced torque transmission through T30 Torx drive system prevents cam-out and tool slippage
• Exceptional holding power achieved through thread forming technology that creates stronger, more secure connections
• Flush installation capability with standard flat head profile and 82° countersink angle for clean, professional finishes
• Optimized for multiple materials with UNC coarse threads designed for superior performance in both wood and sheet metal applications
• Reduced assembly time with partially threaded design that provides easier starting and precise depth control
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe, sustainable manufacturing

Professional Applications & Engineering Value

Engineered for demanding wood and sheet metal applications, these black-phosphate steel screws deliver exceptional performance where traditional fasteners fail. The thread forming technology eliminates the need for pre-tapped holes while creating stronger, more vibration-resistant connections by displacing material rather than removing it. This is particularly valuable in sheet metal assemblies where stripped threads are a common failure point. The Torx T30 drive system provides superior torque transfer, reducing operator fatigue and preventing damage to screw heads during high-torque installations. With 1/4"-20 UNC coarse threads and partial threading, these screws offer excellent pull-out resistance in wood while maintaining easy starting and precise depth control, making them ideal for structural woodworking, metal framing, and composite material assemblies where reliability is paramount.

Specification Summary & Compliance

This 1/4"-20 x 2 1/2" wood screw features UNC coarse threads with standard Class 2A tolerance for consistent performance. The thread forming design follows industry-standard manufacturing practices for superior holding strength. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across various applications. The fastener is engineered with precise dimensional specifications including 0.479" head diameter, 82° countersink angle, and requires No. 3 drill bit (0.213" diameter) for proper installation in thread-forming applications.