S-91775A663 Length 1 1/2" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide Steel finish, extending service life in demanding industrial environments
• Enhanced thread engagement through thread forming design creates permanent, vibration-resistant connections in sheet metal
• Clean, finished appearance with oval head profile that sits flush with material surface for professional installations
• Optimized driving efficiency with No. 2 Phillips drive that reduces cam-out and improves torque transmission
• Maximum material penetration with fully threaded design and pointed tip for faster installation in sheet metal applications
• Precision alignment with 82° countersink angle that ensures proper seating and uniform stress distribution
• Reliable performance with 18 TPI threading that provides excellent holding power in thin gauge materials

Professional Applications & Engineering Value

These thread forming tapping screws are specifically engineered for sheet metal applications where traditional fastening methods often fail. The Black-Oxide Steel construction provides essential corrosion protection in industrial environments, while the A/AB thread forming design creates strong, permanent threads without chips or debris. The fully threaded configuration ensures maximum engagement in materials up to 0.025" thickness, solving common challenges with thin gauge metals. The oval head with 82° countersink delivers both aesthetic appeal and functional benefits, seating flush to prevent snagging while distributing clamping force evenly. These No. 6 x 1-1/2" screws represent an optimal solution for HVAC systems, electronic enclosures, and metal fabrication where vibration resistance and long-term reliability are critical.

Specification Summary & Compliance

These precision-engineered tapping screws feature No. 6 thread diameter (0.138") with 18 TPI threading and Class 2A thread tolerances for consistent performance. The thread forming (Type A/AB) design complies with industry standards for sheet metal fastening, requiring a No. 32 drill bit (0.116" diameter) for proper installation. Manufacturing and material specifications ensure full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making them suitable for global industrial applications requiring verified chemical safety standards.