S-91857A544 1/4"-20 x 1 1/4" ASME B18.6.3 Stainless Steel Round Head Slotted Screws
Stainless Steel Round 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 in harsh environments thanks to 316 stainless steel construction with passivated finish
- Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for demanding applications
- Reliable fastening performance through fully threaded UNC coarse design ensuring maximum engagement
- Precision threading compatibility with Class 2A fit for consistent installation and secure connections
- Easy manual installation with traditional slotted drive design requiring basic tooling
- Regulatory compliance assurance meeting ASME B18.6.3 standards and environmental regulations
- Versatile rounded head profile providing smooth finished appearance and reduced snagging risks
Professional Applications & Engineering Value
This 316 stainless steel slotted rounded head screw delivers critical performance advantages in corrosive and high-stress environments. The combination of UNC coarse threading and fully threaded design ensures maximum thread engagement and vibration resistance, while the passivated finish significantly enhances the natural corrosion resistance of 316 stainless steel. Engineers specify this fastener for applications requiring reliable performance in chemical processing, marine equipment, food processing machinery, and outdoor installations where moisture and corrosive agents are present. The rounded head style with slotted drive offers both aesthetic appeal and practical installation benefits, making it ideal for visible applications where both performance and appearance matter.
Specification Summary & Compliance
This precision fastener features 1/4"-20 UNC coarse threading with Class 2A thread fit ensuring proper clearance and consistent installation. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance requirements. The screw is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no substances of very high concern. With a length of 1-1/4 inches and complete threading, this screw delivers reliable performance across industrial applications requiring inch system fasteners.
