S-92949A329 4-48 x 1/2" ASME B18.3 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 environments
- Exceptional holding power from fully threaded design and Class 3A thread fit, minimizing loosening in high-vibration applications
- High tensile strength of 70,000 psi combined with Rockwell B55 hardness for reliable performance under heavy loads
- Precise installation control with hex drive design and rounded button head for flush mounting and reduced snagging
- Fine thread spacing provides improved adjustment accuracy and better resistance to vibrational loosening
- Right-hand UNF thread compatibility ensures easy integration with standard industrial components
- Regulatory compliance with ASME B18.3, RoHS 3, and REACH for worry-free global sourcing
Professional Applications & Engineering Value
These 4-48 UNF fine thread rounded button head screws deliver critical performance in precision assembly applications where reliability is paramount. The combination of 18-8 stainless steel and passivated finish provides exceptional corrosion resistance, making them ideal for electronics enclosures, medical devices, and marine equipment where moisture exposure is a concern. The fully threaded design ensures maximum engagement strength across the entire length, while the Class 3A thread fit guarantees precise mating with components. The rounded button head profile with hex drive allows for low-profile installation in confined spaces, reducing the risk of snagging while maintaining aesthetic appeal in finished products.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit tolerance and UNF fine thread specifications. These screws meet ASME B18.3 dimensional requirements and are fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. The 1/2" length and 4-48 thread size maintain precise dimensional accuracy throughout production, ensuring consistent performance across industrial applications.
