S-91783A124 5-40 x 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 with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments
- Exceptional mechanical strength with 100,000 psi tensile strength and Rockwell B100 hardness for reliable, long-lasting fastening
- Precision thread engagement through Class 2A fit UNC coarse threads, ensuring consistent installation and vibration resistance
- Optimized drive performance with standard slotted drive and rounded head design for straightforward installation and removal
- Full thread coverage across the entire 1/4" length, providing maximum grip and load distribution in assemblies
- Regulatory compliance assurance meeting ASME B18.6.3 specifications, RoHS 3, and REACH standards for global market acceptance
- Versatile right-hand threading compatible with standard UNC 5-40 components, simplifying inventory and replacement processes
Professional Applications & Engineering Value
These 5-40 UNC thread rounded head slotted screws deliver critical performance in demanding industrial settings where corrosion resistance and mechanical reliability are paramount. The 18-8 stainless steel composition, enhanced by passivated finish, provides exceptional protection against oxidation and chemical exposure in manufacturing, marine, and food processing equipment. The fully threaded design with coarse UNC threading ensures maximum engagement in various materials, reducing the risk of stripping while maintaining consistent clamping force. With 100,000 psi tensile strength, these machine screws withstand high-stress applications in machinery assembly, electronic enclosures, and structural components where vibration resistance and long-term integrity are essential.
Specification Summary & Compliance
Manufactured to precise dimensional standards with Class 2A thread fit and UNC 5-40 coarse thread specifications. Complies with ASME B18.6.3 manufacturing standards for dimensional accuracy and performance. Meets RoHS 3 (2015/863/EU) compliance for restricted substance control and REACH (EC 1907/2006) regulations for chemical safety. Features include 0.125" thread diameter, 1/4" length, right-hand thread direction, and fully threaded construction.
