S-92957A170 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Grip and Tool-Free Operation: Knurled thumb head with hex drive allows for easy manual tightening and removal in tight spaces, reducing assembly time and eliminating the need for tools in many applications.
• Superior Corrosion Resistance: Made from durable 18-8 Stainless Steel, this screw offers excellent resistance to rust and corrosion, ensuring long-term reliability in harsh or washdown environments.
• Precise Component Alignment: The 5mm precise shoulder provides a secure, snug fit for locating parts, minimizing misalignment and reducing wear in pivoting or rotating assemblies.
• High Mechanical Strength: With a 70,000 psi tensile strength and Rockwell B83 hardness, this shoulder screw withstands high stress and load, preventing failure in demanding mechanical applications.
• Reliable and Consistent Thread Engagement: Class 6g thread fit and coarse M4 x 0.7mm threads ensure easy starting, secure fastening, and vibration resistance, maintaining joint integrity.
• Broad Regulatory Compliance: Meets RoHS 3 and REACH standards, making it suitable for use in regulated industries like electronics and machinery without environmental or health concerns.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to solve critical alignment and accessibility challenges in precision assemblies. The 5mm shoulder with its tight diameter tolerance acts as a precise pivot or axle, ensuring components like gears, levers, and PCB boards are accurately positioned, which reduces eccentric wear and improves the lifespan of moving parts. The knurled thumb head and integrated hex drive offer dual functionality, enabling quick adjustments without tools in confined spaces—ideal for machinery maintenance, electronic enclosures, and optical devices. Constructed from 18-8 stainless steel, it resists corrosion from moisture and chemicals, while the coarse metric threads provide robust holding power in materials like aluminum and plastic, preventing loosening under vibration. This combination of precision fit, material durability, and user-friendly design delivers reliable performance in automation, medical equipment, and consumer electronics where fast, secure fastening is essential.

Specification Summary & Compliance

This screw adheres to metric thread standards with an M4 x 0.7mm coarse thread and Class 6g tolerance for consistent fit. The shoulder features precise dimensions: diameter of 5 mm (tolerance: -0.025 to 0 mm) and length of 5 mm (tolerance: 0 to 0.05 mm), ensuring accurate alignment. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of restricted substances for safe use in various industrial and electronic applications.