S-91794A742 4-48 x 3/8" ASME B18.6.3 Stainless Steel Fillister Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction and passivated finish, ensuring long-term reliability in harsh environments.
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical applications.
• Precise, secure fastening achieved with a Class 2A thread fit and UNF fine thread, minimizing the risk of loosening under vibration.
• Easy installation and removal provided by the slotted drive style and high-profile rounded fillister head, offering excellent tool engagement.
• Full threading along the 3/8" length ensures maximum grip and uniform stress distribution in assembled components.
• Compliance with major industry standards including ASME B18.6.3, guaranteeing dimensional accuracy and interchangeability.
• Environmentally responsible manufacturing with RoHS 3 and REACH compliance, meeting global regulatory requirements for hazardous substances.

Professional Applications & Engineering Value

This 4-48 UNF fine thread screw is engineered to address critical challenges in precision assembly, such as vibration resistance and corrosive wear. The 18-8 stainless steel material, combined with a passivated finish, provides exceptional durability against moisture, chemicals, and oxidation, making it ideal for industrial machinery, electronic enclosures, and marine equipment. Its rounded fillister head with a high, narrow profile offers a low silhouette while the slotted drive ensures compatibility with standard tools, facilitating quick maintenance and reducing downtime. The fully threaded design and right-hand thread direction deliver consistent clamping force, preventing joint failure in high-stress environments and enhancing the longevity of your assemblies.

Specification Summary & Compliance

This machine screw adheres to Class 2A thread fit tolerances and the UNF (Unified National Fine) thread system with a size of 4-48, ensuring precise dimensional accuracy per ASME B18.6.3 specifications. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of restricted hazardous substances for safe use in global markets.