S-90935A249 Length 1 1/4" Tapping Screws
Tapping Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
Installation & Application
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Key Features & Benefits at a Glance
- Superior corrosion resistance with Black-Oxide Steel coating, extending service life in demanding environments
- Excellent thread-forming capability for secure, vibration-resistant fastening in sheet metal without pre-tapped holes
- Optimized Phillips No. 2 drive ensures efficient installation with reduced cam-out risk and improved torque transfer
- Fully threaded design provides maximum grip and uniform holding power along the entire 1-1/4" length
- Precise dimensional compatibility with No. 21 drill bits (0.159" diameter) for accurate hole preparation
- Pan head profile offers a balanced combination of low-profile appearance and sufficient bearing surface
- Compliance with environmental regulations including RoHS 3 and REACH for safe industrial usage
Professional Applications & Engineering Value
These Black-Oxide Steel tapping screws deliver exceptional performance in sheet metal fabrication and assembly operations. The thread-forming A/AB design creates precise mating threads in ductile materials, eliminating the need for separate tapping operations and reducing installation time. The fully threaded No. 10-12 configuration ensures consistent clamping force distribution, preventing loosening under vibration while the Phillips drive system provides reliable installation with standard tools. Ideal for HVAC systems, electrical enclosures, and automotive components where corrosion resistance and structural integrity are critical, these screws maintain their protective coating even in moderately corrosive environments.
Specification Summary & Compliance
Manufactured to precise inch system dimensions including 0.19" thread diameter with 12 TPI and Class 2A thread tolerances. Features standard right-hand threading with pointed tip for easy starting. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial compliance. Designed specifically for use with No. 21 drill bits (0.159" diameter) in materials up to 0.025" thickness.
