S-90696A193 1/4"-28 x 5" ASME B18.3 18-8 Stainless Steel Socket Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life.
• High tensile strength of 70,000 psi ensures reliable performance under significant loads and vibration, reducing the risk of fastener failure.
• Precise Class 3A thread fit provides excellent engagement and consistent clamping force for secure assemblies.
• Fine UNF thread design offers improved adjustment accuracy and superior resistance to loosening compared to coarse threads.
• Hex socket drive with 3/16" drive size allows for high-torque installation in confined spaces, minimizing stripping and cam-out.
• Partially threaded shank enables precise positioning and secure fastening where full threading is not required.
• Compliance with ASME B18.3, RoHS 3, and REACH guarantees consistent quality and safety for regulated industries.

Professional Applications & Engineering Value

This 1/4"-28 UNF socket head cap screw is engineered to address critical challenges in precision machinery, automotive, and aerospace assemblies. The 18-8 stainless steel material provides excellent resistance to oxidation and chemical exposure, making it suitable for demanding environments where corrosion could compromise integrity. The fine thread and Class 3A fit ensure minimal backlash and reliable performance in high-vibration applications, reducing maintenance needs. With a Rockwell B70 hardness and 70,000 psi tensile strength, it withstands heavy dynamic loads without deformation. The hex drive design facilitates secure installation in tight spaces, enhancing efficiency in automated or manual assembly processes while meeting stringent ASME B18.3 specifications.

Specification Summary & Compliance

This screw features a 1/4"-28 UNF fine thread with Class 3A thread fit for high precision, a 5" length with a partially threaded design, and a 3/16" hex drive. It is manufactured in compliance with ASME B18.3 standards and is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring adherence to environmental and safety regulations.