S-90696A191 1/4"-28 x 4 1/2" ASME B18.3 18-8 Stainless Steel Socket Head Screws
18-8 Stainless Steel Socket 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 with 18-8 stainless steel construction, ideal for harsh environments and extended service life
- Exceptional tensile strength rated at 70,000 psi for reliable performance under high-stress industrial applications
- Precision Class 3A thread fit ensures secure, vibration-resistant fastening with minimal backlash
- Fine UNF threads provide improved load distribution and superior clamping force compared to coarse threads
- Hex socket drive design allows for high torque application and installation in confined spaces
- Rockwell B70 hardness maintains thread integrity and prevents stripping during repeated use
- Comprehensive regulatory compliance including ASME B18.3, RoHS 3, and REACH for global industrial acceptance
Professional Applications & Engineering Value
This 1/4"-28 UNF socket head cap screw delivers critical engineering advantages where precision and reliability are paramount. The 18-8 stainless steel composition provides excellent corrosion resistance for applications in chemical processing, marine environments, and food equipment where moisture resistance is essential. The fine UNF threads with Class 3A precision fit offer superior vibration resistance in machinery, automotive assemblies, and precision instruments, preventing loosening under dynamic loads. The partially threaded design allows for optimal clamping force distribution while the hex socket drive enables high-torque installation in space-constrained applications. These features combine to solve common industrial challenges including thread stripping, corrosion failure, and maintenance downtime.
Specification Summary & Compliance
This socket head cap screw maintains Class 3A thread fit per UNF standards with precise 1/4"-28 fine threading and 4 1/2" length. Manufacturing conforms to ASME B18.3 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance for industrial applications.
