S-97763A352 1/4"-28 x 3/8" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide coated 18-8 Stainless Steel, ideal for harsh environments and extended service life.
• Exceptional thread engagement and reliability due to the Class 3A fit and 1/4"-28 UNF fine threading, minimizing the risk of loosening under vibration.
• High mechanical strength with a 70,000 psi tensile strength and Rockwell B55 hardness, ensuring dependable performance in demanding applications.
• Efficient and secure installation provided by the hex drive (5/32") and rounded button head design, allowing for high torque application and a clean, finished appearance.
• Maximum grip and holding power from being fully threaded along the entire 3/8" length, providing consistent clamping force.
• Guaranteed dimensional precision and interchangeability as the screw is manufactured to meet the stringent ASME B18.3 specification.
• Safe for use in regulated industries with full compliance to RoHS 3 and REACH environmental standards.

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel Rounded Head Screw is engineered to solve critical challenges in precision assembly and industrial maintenance. The fine UNF thread and Class 3A fit provide superior vibration resistance, making it an excellent choice for machinery, automotive subsystems, and electronic enclosures where secure fastening is paramount. The combination of high tensile strength and corrosion-resistant stainless steel material ensures long-term integrity, even when exposed to moisture, chemicals, or varying temperatures. The hex drive and low-profile rounded head facilitate installation in confined spaces while providing a flush finish, enhancing both the aesthetic and functional value of the final product.

Specification Summary & Compliance

This precision fastener features a 1/4"-28 UNF thread with a Class 3A thread fit for high precision. It is fully threaded and measures 3/8" in length. Manufacturing and quality are controlled to meet the ASME B18.3 standard. The product is also confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it adheres to the latest environmental and safety regulations for hazardous substances.