S-91783A110 4-40 x 1/2" 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 with 18-8 stainless steel construction and passivated finish for extended service life in harsh environments
- Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable performance under high stress
- Precision threading with Class 2A UNC coarse threads ensuring secure fastening and easy installation
- Full threading design provides maximum grip length and uniform load distribution across the entire fastener
- Standard rounded head profile with slotted drive offers straightforward installation and removal with common tools
- Right-hand thread direction with coarse spacing delivers quick assembly and disassembly in industrial applications
- Comprehensive compliance with ASME B18.6.3 specifications ensures dimensional accuracy and interchangeability
Professional Applications & Engineering Value
This 4-40 UNC rounded head slotted machine screw delivers critical performance advantages in demanding industrial environments. The 18-8 stainless steel composition combined with passivated finish creates a robust barrier against corrosion, making it ideal for applications exposed to moisture, chemicals, or outdoor conditions. The fully threaded design and Class 2A thread fit ensure consistent engagement and reliable clamping force in precision assemblies. With 100,000 psi tensile strength, this fastener maintains structural integrity in high-vibration equipment, electronic enclosures, and machinery where corrosion-resistant screws are essential for long-term reliability and reduced maintenance intervals.
Specification Summary & Compliance
This machine screw features 4-40 UNC coarse threads with Class 2A thread fit for precise dimensional tolerance. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in various industrial applications while meeting international quality and safety requirements.
