S-92949A840 1/4"-28 x 5/16" ASME B18.3, ASTM F879 Stainless Steel Button Head Hex-Drive Screws
Stainless Steel Button Head Hex-Drive 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 and passivated finish, ideal for harsh industrial environments
- Precise, secure fastening ensured by Class 3A fine thread fit and fully threaded design for maximum engagement and vibration resistance
- High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Easy installation and removal with 5/32" hex drive and rounded button head design, reducing tool slippage and assembly time
- Reliable dimensional accuracy meeting ASME B18.3 specifications for consistent fit and interchangeability
- Environmental compliance with RoHS 3 and REACH standards, ensuring safe use in regulated industries
- Versatile thread compatibility with 1/4"-28 UNF fine threads, suitable for precision assemblies requiring fine adjustments
Professional Applications & Engineering Value
Engineered for precision industrial applications, these 1/4"-28 UNF rounded head screws address critical challenges in machinery, electronics, and automotive assemblies. The 18-8 Stainless Steel material combined with a passivated finish provides exceptional resistance to oxidation and chemical exposure, extending service life in corrosive settings. The Class 3A fine thread fit and fully threaded design minimize loosening under vibration, while the hex drive and button head profile facilitate quick, secure installations in tight spaces. Ideal for high-stress environments where reliability and compliance with ASME B18.3 standards are paramount, these screws ensure reduced maintenance and enhanced operational safety.
Specification Summary & Compliance
This screw features a 1/4"-28 UNF fine thread with Class 3A tolerance for precise fit, and is fully threaded for uniform load distribution. It complies with ASME B18.3 manufacturing specifications, ensuring dimensional consistency. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious and regulated industrial applications.
