S-94209A480 4-40 x 1/4" Tapping Screws
Tapping 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 protective coating for extended service life in demanding industrial environments
- Enhanced torque transmission through Torx Plus IP10 drive system, reducing cam-out and tool wear
- Reliable thread forming capability with Tri-Lobe shank design creating secure, vibration-resistant threads in aluminum, brass, and copper
- Optimized for soft materials with coarse UNC threading providing excellent holding power in non-ferrous metals
- Full regulatory compliance meeting RoHS 3 and REACH standards for global industrial applications
- Precision length control with tight tolerance (-0.03" to 0") ensuring consistent installation performance
- Complete threading coverage along the 1/4" length for maximum engagement and pull-out resistance
Professional Applications & Engineering Value
These 4-40 UNC Tri-Lobe tapping screws are specifically engineered for thread forming applications in non-ferrous metals including aluminum, brass, and copper. The black corrosion-resistant coated steel construction provides exceptional durability against environmental factors, while the Tri-Lobe shank cross-section displaces material during installation to create strong, permanent threads without chip formation. The Torx Plus drive system (IP10/T10) delivers superior torque transmission, minimizing stripping and enabling higher installation speeds in automated assembly processes. These thread forming screws are ideal for electrical enclosures, HVAC components, and precision machinery where reliable fastening in soft materials is critical to long-term performance.
Specification Summary & Compliance
These No. 4 tapping screws feature 4-40 UNC coarse threads with Class 2A tolerance, right-hand threading, and 1/4" length with precision manufacturing control. The thread forming tapping method is optimized for use with No. 44 drill bits (0.086" diameter). Manufacturing and material compliance includes full adherence to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.
