S-91794A745 4-48 x 3/4" 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 construction and passivated finish, ideal for harsh industrial environments
- Exceptional mechanical strength delivering 70,000 psi tensile strength and Rockwell B55 hardness for reliable, long-term fastening
- Precision fine threading with 4-48 UNF Class 2A fit ensures secure, vibration-resistant connections in machinery assemblies
- Optimized fillister head design provides a high, narrow profile for deeper tool engagement and reduced head protrusion
- Full 3/4" threading offers maximum grip length and load distribution across the entire fastener
- Broad regulatory compliance including ASME B18.6.3, RoHS 3, and REACH for use in regulated and international markets
- Slotted drive compatibility allows for easy installation and removal with standard tools
Professional Applications & Engineering Value
This 4-48 UNF machine screw is engineered to address critical fastening challenges in precision equipment, electronics, and machinery where corrosion resistance and high tensile strength are paramount. The 18-8 Stainless Steel material, enhanced by a passivated finish, prevents oxidation and chemical degradation in humid or corrosive settings. Its fine thread spacing and Class 2A thread fit provide superior holding power and resistance to loosening under dynamic loads. The rounded fillister head design allows for countersunk or flush mounting in tight spaces, making it ideal for applications requiring a low-profile, high-strength fastener that meets rigorous ASME B18.6.3 standards.
Specification Summary & Compliance
This screw features a 4-48 UNF thread with Class 2A dimensional tolerance and fine thread spacing for precise fit. It is manufactured in compliance with ASME B18.6.3 specifications and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring it is free of hazardous substances and suitable for global industrial use.
