S-92949A548 1/4"-20 x 1 3/4" ASME B18.3 Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• Exceptional holding power with a high 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term fastening.
• Precise, secure thread engagement ensured by Class 3A thread fit and UNC coarse threading, reducing the risk of cross-threading.
• Efficient installation and removal with a hex drive (5/32") and rounded button head design, allowing for high torque application and a clean finish.
• Full thread coverage along the 1 3/4" length provides maximum grip and adjustability in a wide range of material thicknesses.
• Guaranteed quality and safety through compliance with ASME B18.3 manufacturing standards, RoHS 3, and REACH regulations.
• Versatile right-hand thread design with coarse thread spacing for quick assembly in most common industrial applications.

Professional Applications & Engineering Value

This 1/4-20 UNC rounded head screw is engineered to solve critical fastening challenges in demanding sectors. The core of its value lies in the 18-8 stainless steel material and passivated finish, which work in tandem to provide outstanding resistance to rust and corrosion, significantly extending service life in moist or chemically aggressive environments like outdoor equipment, food processing machinery, and marine applications. The combination of a Class 3A thread fit and coarse threading ensures a precise, vibration-resistant connection that prevents loosening under dynamic loads. The hex drive and button head profile facilitate high-torque installation with standard tools, creating a flush, low-profile finish that enhances safety and aesthetics on assembly lines and in finished products.

Specification Summary & Compliance

This screw is manufactured to precise dimensional standards, featuring a 1/4"-20 UNC thread with a Class 3A fit for superior thread engagement. The manufacturing process and final product are fully compliant with the ASME B18.3 specification. Furthermore, this component is verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it is free of hazardous substances and safe for use in regulated markets.