S-90198A108 Length 3/4" Tapping Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and outdoor applications.
• Efficient thread-forming design (Type A/AB) creates strong, permanent threads in sheet metal without pre-tapping, reducing installation time.
• Secure, flush-mount installation with a standard flat head and 82° countersink angle, providing a smooth surface finish and preventing snagging.
• Reliable, non-slip driving from the No. 1 Phillips drive, ensuring high torque transfer and reducing the risk of tool cam-out and head stripping.
• Maximum holding power due to the fully threaded shank, distributing clamp load evenly along the entire 3/4" length in thin materials.
• Precision compatibility with a No. 44 drill bit (0.086" diameter), ensuring a perfect fit for sheet metal up to 0.025" thick.
• Global regulatory compliance with RoHS 3 and REACH, guaranteeing safe, environmentally responsible materials for your supply chain.

Professional Applications & Engineering Value

This No. 4-24 x 3/4" tapping screw is engineered to solve critical fastening challenges in sheet metal assemblies. Made from 316 stainless steel, it offers exceptional resistance to chlorides and acidic environments, preventing failure in HVAC, marine, and chemical processing equipment. The thread-forming (Type A/AB) design displaces material to create robust, strip-resistant threads without chips, making it perfect for blind holes and thin-gauge metals. The Phillips flat head with an 82° countersink ensures a clean, aerodynamic profile, while the fully threaded body provides superior pull-out strength. This combination delivers reliable performance, reduces assembly costs, and extends service life in demanding industrial applications.

Specification Summary & Compliance

This screw features a No. 4-24 thread with a 0.112" diameter and approximately 24 threads per inch, conforming to standard inch-series tolerances for thread-forming screws. The flat head profile and No. 1 Phillips drive are manufactured to industry standards. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring the absence of hazardous substances and supporting sustainable manufacturing practices.