S-92381A203 4-40 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and passivated finish for extended service life in harsh environments
• Exceptional mechanical strength with 70,000 psi tensile strength and Rockwell B79 hardness for reliable performance under heavy loads
• Precise alignment and positioning with controlled shoulder diameter (1/8") and length (3/8") tolerances for accurate component mounting
• Secure fastening performance with Class 2A thread fit and coarse UNC threading providing excellent engagement and vibration resistance
• Space-saving design featuring ultra-low socket head profile ideal for applications with limited clearance
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
• Easy installation and maintenance with slotted drive style allowing simple tool engagement and disassembly

Professional Applications & Engineering Value

These precision shoulder screws deliver critical engineering value in applications requiring exact component positioning and reliable fastening. The 316 stainless steel construction with passivated finish provides exceptional resistance to chemicals, saltwater, and industrial atmospheres, making them ideal for marine equipment, chemical processing machinery, and food processing applications. The precisely controlled shoulder diameter and length tolerances ensure accurate alignment of moving parts in assemblies, while the Class 2A thread fit with coarse UNC threading maintains secure fastening even in high-vibration environments. The combination of 70,000 psi tensile strength and Rockwell B79 hardness guarantees durability in demanding mechanical systems, from precision instruments to industrial automation equipment.

Specification Summary & Compliance

These 4-40 UNC shoulder screws feature Class 2A thread fit with precise dimensional control including shoulder diameter tolerance of -0.001" to 0" and shoulder length tolerance of 0" to 0.002". Manufactured to industrial standards with right-hand thread direction and coarse thread spacing. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety and restricted substance control.