S-91792A113 4-40 x 3/4" ASME B18.6.3 Stainless Steel Pan Head Slotted Screws

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 performance under heavy loads
• Precision threading with Class 2A fit and UNC coarse thread profile ensuring secure fastening and vibration resistance
• Easy installation and removal with standard slotted drive design and fully threaded shank for maximum grip and accessibility
• Regulatory compliance assurance meeting ASME B18.6.3 standards plus RoHS 3 and REACH environmental regulations
• Optimized head design featuring rounded pan head profile for reduced surface protrusion and improved aesthetic integration
• Consistent dimensional accuracy with precise 3/4" length and standardized inch measurements for reliable interchangeability

Professional Applications & Engineering Value

These 4-40 UNC rounded pan head slotted screws deliver critical performance advantages in demanding industrial applications. The 18-8 stainless steel composition combined with passivated finish provides exceptional resistance to corrosion and chemical exposure, making them ideal for manufacturing equipment, electronic enclosures, and marine components. The coarse thread design ensures rapid installation and superior holding power in various materials, while the Class 2A thread fit guarantees consistent engagement and vibration resistance. With 100,000 psi tensile strength and Rockwell B100 hardness, these fasteners maintain structural integrity in high-stress assemblies, reducing maintenance frequency and downtime across automotive, aerospace, and industrial machinery applications.

Specification Summary & Compliance

This 4-40 UNC screw features precise dimensional specifications including 3/4" length, 0.219" head diameter, and standardized Class 2A thread fit tolerances. Manufacturing complies with ASME B18.6.3 standards for dimensional consistency and performance reliability. Environmental compliance is verified through RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring safe use in regulated industries. The right-hand coarse thread configuration and fully threaded design provide maximum engagement strength across the entire fastener length.