S-91613A456 1/4"-20 x 1" ASME B18.6.3 Stainless Steel Fillister Head Slotted Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments thanks to 316 stainless steel construction and passivated finish
• Exceptional mechanical strength with a 100,000 psi tensile strength and Rockwell B100 hardness for reliable, long-term performance
• Optimized for high-torque assembly with a Fillister head and deep slotted drive for secure tool engagement
• Robust and reliable fastening ensured by a fully threaded 1/4"-20 UNC coarse thread design for superior grip and vibration resistance
• Precision manufacturing with a Class 2A thread fit for consistent, high-quality assembly and interchangeability
• Compliance with major industrial standards including ASME B18.6.3, ensuring product reliability and specification adherence
• Safe for regulated industries with full compliance to RoHS 3 and REACH environmental and safety directives

Professional Applications & Engineering Value

This Fillister Head Slotted Screw is engineered to solve critical challenges in demanding industrial applications. The core of its value lies in the 316 stainless steel material, which provides outstanding resistance to corrosion from chemicals, saltwater, and other aggressive agents, making it ideal for marine, chemical processing, and food equipment. The combination of the high, narrow rounded head profile and deep slotted drive offers a low-profile yet robust fastening solution that can withstand high torque during installation without stripping. The coarse UNC thread and fully threaded design ensure rapid assembly and superior holding power in a variety of materials, from metal to plastic, reducing the risk of loosening under vibration. This screw is a dependable choice for engineers seeking a durable, corrosion-resistant screw that maintains integrity in harsh operational environments.

Specification Summary & Compliance

This screw is manufactured to precise dimensional standards, featuring a 1/4"-20 UNC thread with a Class 2A thread fit for consistent assembly. It conforms to the ASME B18.6.3 specification for slotted head screws, ensuring mechanical and dimensional reliability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of hazardous substances and safe for use in regulated markets.