S-91735A616 1/4"-28 x 1 1/4" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 Stainless Steel construction and passivated finish
• Reliable, high-strength fastening with 80,000 psi tensile strength and Rockwell B85 hardness for demanding applications
• Precise, secure thread engagement ensured by Class 2A thread fit and UNF fine threading for vibration resistance
• Efficient installation and removal with a No. 3 Phillips drive and standard pan head design
• Full-length threading provides consistent grip and load distribution along the entire 1 1/4" length
• Compliance with major industry standards including ASME B18.6.3 for guaranteed dimensional accuracy and performance
• Environmentally responsible manufacturing meeting RoHS 3 and REACH regulations for safe industrial use

Professional Applications & Engineering Value

This 316 Stainless Steel pan head screw is engineered to solve critical challenges in corrosive and high-stress environments. The UNF fine thread and Class 2A fit provide superior resistance to loosening under vibration, making it ideal for precision machinery, marine equipment, and chemical processing applications. The passivated finish enhances the innate corrosion resistance of 316 stainless steel, significantly extending service life in moist or chemically aggressive settings. With its fully threaded design and Phillips drive, it ensures uniform clamping force and efficient installation in automated or manual assembly lines, reducing downtime and maintenance costs.

Specification Summary & Compliance

This screw features a 1/4"-28 UNF fine thread with Class 2A tolerance for precise fit. Manufactured to ASME B18.6.3 specifications, it ensures consistent dimensional accuracy. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for regulated industrial and international markets.