S-92198A575 1/4"-20 x 9" ASME B18.2.1 18-8 Stainless Steel Hex Head Screws
18-8 Stainless Steel Hex Head Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Superior corrosion resistance from 18-8 stainless steel construction, ideal for harsh environments and long-term outdoor use
- Exceptional mechanical strength with 80,000 psi tensile strength and Rockwell B70 hardness for reliable performance under heavy loads
- Optimized for high-speed assembly with UNC coarse threads and Class 2A thread fit ensuring smooth, rapid installation
- Secure external hex drive provides excellent torque transmission and prevents stripping during high-torque applications
- Partial threading design offers superior clamping force and vibration resistance in demanding assemblies
- Full regulatory compliance with ASME B18.2.1 standards plus RoHS 3 and REACH for global industrial acceptance
- Versatile 9-inch length accommodates thick material sections while maintaining structural integrity
Professional Applications & Engineering Value
This 1/4"-20 UNC coarse thread screw addresses critical engineering challenges in heavy machinery, structural frameworks, and industrial equipment assembly. The 18-8 stainless steel composition provides inherent corrosion resistance that withstands chemical exposure and atmospheric conditions, eliminating premature failure in manufacturing plants and marine applications. The partially threaded design concentrates clamping force precisely where needed, preventing joint loosening under vibration while the external hex head ensures maximum torque application without cam-out. With 80,000 psi tensile strength, this fastener maintains structural integrity in high-stress connections, making it ideal for construction, transportation equipment, and industrial maintenance where reliability is paramount.
Specification Summary & Compliance
Manufactured to precise Class 2A thread fit tolerances with UNC coarse threading (1/4"-20) and partial threading over minimum 1" length. Full compliance with ASME B18.2.1 dimensional standards, RoHS 3 (2015/863/EU) hazardous substance restrictions, and REACH (EC 1907/2006) chemical safety regulations. Inch system measurements include 9" overall length with 7/16" hex head width and 5/32" head height.
