S-91783A113 4-40 x 3/4" 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 with 18-8 Stainless Steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional mechanical strength delivering 100,000 psi tensile strength for reliable, heavy-duty fastening applications
- Precise thread engagement with Class 2A UNC coarse threads ensuring consistent fit and reduced cross-threading risks
- Full-threaded design providing maximum grip length and uniform load distribution across the entire fastener
- Standardized compliance meeting ASME B18.6.3 specifications for dimensional accuracy and interchangeability
- Environmental safety through RoHS 3 and REACH compliance, eliminating hazardous substance concerns
- Optimized drive performance with slotted rounded head design for straightforward installation and removal
Professional Applications & Engineering Value
This 4-40 UNC machine screw delivers critical engineering value through its 18-8 Stainless Steel composition and passivated finish, providing exceptional resistance to oxidation and chemical degradation in demanding environments. The fully threaded design with coarse thread spacing ensures rapid installation and superior holding power in materials where fine threads might strip. With 100,000 psi tensile strength and Rockwell B100 hardness, it maintains structural integrity under vibration and dynamic loads common in industrial machinery, electronic enclosures, and precision equipment. The rounded head slotted configuration offers reliable drive engagement while minimizing protrusion in space-constrained assemblies.
Specification Summary & Compliance
This fastener maintains Class 2A thread fit tolerances per UNC standards with right-hand threading and 3/4" length. Manufacturing complies with ASME B18.6.3 dimensional specifications. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring restriction of hazardous substances in industrial applications.
