S-90399A249 Length 1 1/4" Tapping Screws

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-phosphate steel coating, ideal for harsh industrial environments
• Superior holding power through thread forming technology that creates strong, permanent threads in sheet metal
• Integrated flat washer design distributes load evenly and prevents surface damage during installation
• Wide truss head profile provides excellent bearing surface and reduces the risk of pull-through
• Precision Phillips No. 2 drive ensures secure tool engagement and reduces cam-out during installation
• Full threading with pointed tip allows for easy starting and smooth penetration into materials up to 0.025" thickness
• Regulatory compliance meets RoHS 3 and REACH standards for environmentally responsible manufacturing

Professional Applications & Engineering Value

These No. 10 Phillips Truss Head Tapping Screws with integrated flat washer are engineered specifically for sheet metal applications where vibration resistance and permanent fastening are critical. The thread forming technology eliminates the need for pre-tapped holes while creating stronger, more reliable connections than traditional thread-cutting screws. The black-phosphate steel construction provides exceptional corrosion protection in demanding environments, from HVAC systems to electrical enclosures and automotive assemblies. The combination of the wide truss head design and integrated steel washer distributes clamping force effectively, preventing material deformation and maintaining joint integrity under stress and thermal cycling conditions common in industrial settings.

Specification Summary & Compliance

These tapping screws feature a No. 10 size with 0.19" thread diameter and 12 threads per inch, fully threaded with a pointed tip for optimal penetration. The 1-1/4" length with Class 2A thread tolerance ensures precise fit in materials up to 0.025" maximum thickness. Manufactured to industry standards for thread forming screws (Type A/AB) with right-hand threading and round shank cross-section. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and restricted substances.