S-90315A531 Length 4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction for long-lasting performance in harsh industrial environments
• Effortless installation through thread forming design that creates strong, permanent threads without pre-tapping
• Optimal flush finishing with standard oval head profile and 82° countersink angle for smooth, professional appearances
• Enhanced driving control provided by Phillips No. 2 drive style, reducing cam-out and improving installation efficiency
• Maximum holding power from fully threaded 4" length design, ensuring superior grip throughout the entire fastener
• Precision compatibility with No. 21 drill bit (0.159" diameter) for accurate hole preparation in sheet metal applications
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe, environmentally responsible manufacturing

Professional Applications & Engineering Value

These No. 10-12 thread forming tapping screws are specifically engineered to solve critical fastening challenges in sheet metal applications. The A/AB tapping screw type with thread forming capability eliminates the need for separate tapping operations, significantly reducing assembly time and labor costs. Made from 18-8 stainless steel, these screws provide exceptional resistance to corrosion and oxidation, making them ideal for outdoor equipment, HVAC systems, and industrial machinery exposed to moisture or chemicals. The fully threaded design ensures maximum thread engagement throughout the entire 4" length, distributing stress evenly and preventing loosening under vibration. The oval head with Phillips drive combines aesthetic appeal with practical installation, while the precise 82° countersink angle allows for flush mounting that eliminates snagging points and maintains clean product lines.

Specification Summary & Compliance

These tapping screws feature precision No. 10-12 thread specifications with right-hand thread direction and fully threaded construction. The manufacturing adheres to standard Class 2A thread tolerances for consistent performance. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and restricted substance control. The screws are designed for use with No. 21 drill bits (0.159" diameter) and are optimized for sheet metal applications with maximum drilling thickness of 0.025".