S-92198A572 1/4"-20 x 8 1/2" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• High tensile strength of 80,000 psi ensures reliable performance under heavy loads and vibration
• External hex drive design provides secure tool engagement and easy installation with standard wrenches
• Partially threaded configuration allows for precise clamping force control and reduced thread galling
• Class 2A thread fit guarantees consistent assembly and interchangeability with standard nuts
• Coarse UNC threading enables quick installation and superior performance in softer materials
• Rockwell B70 hardness maintains thread integrity and prevents stripping during repeated use

Professional Applications & Engineering Value

This 1/4"-20 UNC hex head screw delivers exceptional engineering value through its 18-8 stainless steel composition and partially threaded design. The corrosion-resistant properties make it ideal for outdoor equipment, marine applications, and chemical processing facilities where moisture and corrosive elements are concerns. The coarse thread spacing provides superior holding power in softer materials like aluminum and wood, while the external hex drive ensures maximum torque transmission without cam-out. With its 8 1/2" length and Class 2A thread fit, this fastener solves critical challenges in structural assemblies, machinery mounting, and heavy-duty framing where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

Manufactured to precise inch system dimensions with Class 2A thread fit tolerance for consistent performance. Complies with ASME B18.2.1 manufacturing standards for hex head screws and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features UNC coarse threads with right-hand direction and partial threading configuration as specified.