S-91773A746 4-48 x 1" ASME B18.6.3 Stainless Steel Round Head Phillips Screws
Stainless Steel Round Head Phillips 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 and passivated finish, ideal for harsh environments and extended service life.
- Exceptional mechanical strength offering 100,000 psi tensile strength and Rockwell B100 hardness for reliable, high-stress fastening.
- Precise and secure threading with a 4-48 UNF fine thread and Class 2A fit, ensuring tight, vibration-resistant connections.
- Optimized drive engagement via the No. 1 Phillips drive and rounded head design, enabling efficient installation and reduced cam-out.
- Full-threaded length for maximum grip and load distribution along the entire 1" shank in various material thicknesses.
- Regulatory compliance and quality assurance meeting ASME B18.6.3 standards, RoHS 3, and REACH, ensuring safety and environmental responsibility.
- Versatile inch-system sizing with standardized dimensions for broad compatibility in North American and international precision assemblies.
Professional Applications & Engineering Value
Engineered for precision assemblies, these 4-48 UNF fine thread screws address critical needs in electronics, aerospace, and instrumentation where vibration resistance and corrosion prevention are paramount. The 18-8 Stainless Steel construction, enhanced by a passivated finish, withstands oxidative and chemical exposure, reducing maintenance in demanding conditions. The rounded head and Phillips drive facilitate quick, flush installations without snagging, while the fully threaded design ensures consistent clamping force. By adhering to ASME B18.6.3, these screws deliver reliable performance in high-strength applications, minimizing loosening and failure risks.
Specification Summary & Compliance
This screw features a 4-48 UNF fine thread with Class 2A tolerance for precise fit, a length of 1", and a No. 1 Phillips drive. It complies with ASME B18.6.3 manufacturing specifications and is certified RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring adherence to industry and environmental standards for safe, reliable use.
