S-92240A104 1/4"-28 x 1 1/4" 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 with 18-8 stainless steel construction, ideal for harsh industrial environments
- Exceptional tensile strength rated at 80,000 psi for reliable performance under heavy loads
- Precision Class 2A thread fit ensures smooth installation and secure fastening in UNF fine thread applications
- Full threading along the 1-1/4" length provides maximum grip and uniform stress distribution
- External hex drive design allows for high-torque installation with standard tools
- Rockwell B70 hardness maintains thread integrity and prevents stripping during repeated use
- Compliance with major regulations including RoHS 3 and REACH for global industrial acceptance
Professional Applications & Engineering Value
This 1/4"-28 UNF hex head screw delivers critical performance in demanding applications where corrosion resistance and mechanical strength are paramount. The 18-8 stainless steel composition provides excellent durability against moisture, chemicals, and temperature variations, making it suitable for industrial machinery, automotive assemblies, and marine equipment. The fine thread spacing and Class 2A fit ensure vibration resistance and precise alignment in components requiring secure fastening. With full threading along its entire length, it offers superior load distribution compared to partially threaded alternatives, reducing the risk of joint failure. The external hex drive facilitates quick installation and removal with common tools, streamlining maintenance operations in production environments.
Specification Summary & Compliance
Manufactured to ASME B18.2.1 specifications with Class 2A thread fit tolerance for consistent performance. The screw features 1/4"-28 UNF fine threads in right-hand direction with complete threading over the 1-1/4" length. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use in regulated industries. Material hardness maintained at Rockwell B70 with tensile strength of 80,000 psi.
