S-91794A743 4-48 x 1/2" ASME B18.6.3 Stainless Steel Fillister Head Slotted Screws
Stainless Steel Fillister Head Slotted 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 for extended service life in harsh environments
- High-strength performance delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing applications
- Precise thread engagement with Class 2A fit and UNF fine threads ensuring vibration resistance and secure fastening
- Enhanced drive stability from the high-profile fillister head design providing superior torque transmission with slotted drive
- Full threading coverage along the 1/2" length for maximum grip strength and uniform stress distribution
- Regulatory compliance assurance meeting ASME B18.6.3 standards and RoHS/REACH environmental directives
- Optimized head geometry with rounded fillister profile offering improved clearance and professional appearance
Professional Applications & Engineering Value
This 4-48 UNF machine screw delivers critical engineering solutions where corrosion resistance and high tensile strength are paramount. The 18-8 Stainless Steel construction with passivated finish prevents galvanic corrosion in chemical processing, marine, and food equipment applications. The fine UNF threads with Class 2A fit maintain clamping force under vibration, making these rounded fillister head screws ideal for precision assemblies requiring repeated disassembly. The high-profile head design provides enhanced bearing surface for secure fastening in electronic enclosures, instrumentation, and machinery where slotted drive accessibility is preferred for maintenance.
Specification Summary & Compliance
Manufactured to ASME B18.6.3 specifications with Class 2A thread fit tolerance for precision assembly. The 4-48 UNF fine thread configuration ensures reliable performance in demanding applications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations. Features fully threaded 1/2" length with right-hand threading orientation for standard installation procedures.
