S-8077A438 10-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction, ideal for harsh industrial environments and chemical exposure
• Exceptional mechanical strength providing 70,000 psi tensile and 35,000 psi shear capacity for heavy-duty applications
• Precision alignment and smooth rotation enabled by the precisely machined shoulder with tight diameter and length tolerances
• Enhanced grip and tool engagement with knurled head texture and standard hex socket drive for secure installation
• Reliable thread performance with Class 3A UNC coarse threads ensuring secure fastening in demanding conditions
• Durable surface protection through black oxide finish that resists wear and reduces galling
• Full regulatory compliance meeting ASME B18.3 standards and environmental regulations including RoHS 3 and REACH

Professional Applications & Engineering Value

This 316 stainless steel shoulder screw delivers critical engineering value in precision assembly applications where alignment, corrosion resistance, and mechanical strength are paramount. The black oxide finish enhances durability while reducing friction during installation, particularly important in automated assembly lines. The precisely machined shoulder diameter and length with tight tolerances ensure perfect alignment in machinery, pivots, and rotating assemblies, eliminating the need for additional bushings or spacers. With UNC coarse threading and Class 3A thread fit, these shoulder screws provide reliable fastening in vibration-prone environments while the knurled head and socket drive prevent tool slippage during torque application. Ideal for industrial equipment, automotive components, and precision instruments requiring repeated disassembly and reassembly.

Specification Summary & Compliance

This shoulder screw features precision 10-24 UNC coarse threading with Class 3A thread fit for superior engagement. Critical dimensions include shoulder diameter of 1/4" with tolerance of -0.004" to -0.002" and shoulder length of 2 3/4" with tolerance of -0.005" to 0.005". Manufactured to ASME B18.3 specifications with full compliance to RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Material certification confirms 316 stainless steel composition with Rockwell B79 hardness rating.