S-90399A150 Length 5/8" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-phosphate steel construction for extended service life in demanding industrial environments
• Enhanced load distribution through wide truss head design that reduces material stress and prevents pull-through
• Integrated flat steel washer provides immediate sealing and eliminates the need for separate washers, saving installation time
• Thread forming design creates strong, permanent threads in sheet metal without chip removal, ensuring vibration-resistant fastening
• Optimized for 0.025" maximum drilling thickness with precise No. 32 drill bit compatibility for consistent performance in sheet metal applications
• Full threading delivers maximum grip along the entire screw length for superior holding power in thin materials
• Phillips No. 2 drive enables efficient installation with common tools while minimizing cam-out risks

Professional Applications & Engineering Value

These No. 6 x 5/8" Phillips Truss Head tapping screws are engineered specifically for sheet metal applications where reliability and vibration resistance are critical. The thread forming A/AB tapping screw design creates durable, permanent threads in metal substrates without generating chips, eliminating contamination concerns in electrical enclosures, HVAC systems, and automotive assemblies. The combination of black-phosphate steel construction and integrated flat steel washer provides both corrosion protection and immediate surface sealing, while the wide truss head profile distributes clamping force across a larger area to prevent deformation in thin-gauge materials. With 0.138" thread diameter and 18 threads per inch, these screws deliver optimal thread engagement for maximum pull-out strength in industrial fastening applications.

Specification Summary & Compliance

These thread forming sheet metal screws feature precision right-hand threads with standard A/AB tapping screw specifications. The fully threaded design ensures consistent performance across the entire 5/8" length, while the 0.138" thread diameter and 18 TPI provide optimal fastening characteristics. Manufactured to industry standards for sheet metal fasteners, these screws are compatible with No. 32 drill bits (0.116" diameter) and designed for 0.025" maximum drilling thickness. The construction meets industrial requirements for steel fasteners and complies with relevant material and performance specifications for commercial and industrial applications.