S-98621A157 M8 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Wear Resistance: TiCN coating significantly extends service life in high-friction applications, reducing replacement frequency and maintenance costs.
• Superior Corrosion Resistance: 18-8 stainless steel construction provides excellent protection against rust and chemical exposure in harsh industrial environments.
• Precise Component Alignment: The precisely machined 10mm shoulder diameter with tight tolerance ensures accurate positioning and reduces assembly errors.
• High Load-Bearing Capacity: 70,000 psi tensile strength and Rockwell B55 hardness deliver reliable performance under substantial mechanical stress.
• Secure Fastening with Standard Tools: Hex socket drive (5mm) allows for easy installation with common tools while preventing cam-out in high-torque applications.
• Optimized Thread Engagement: Class 6g thread fit with coarse 1.25mm pitch ensures consistent, vibration-resistant connections in dynamic assemblies.
• Regulatory Compliance Assurance: Meets RoHS 3 and REACH standards, making it suitable for regulated industries and international supply chains.

Professional Applications & Engineering Value

This M8 shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 18-8 stainless steel core provides inherent corrosion resistance, while the TiCN coating dramatically reduces wear in high-cycle applications such as rotating assemblies and linear guides. The precise shoulder dimensions (10mm diameter, 25mm length) with minimal tolerances ensure exact component positioning, eliminating play in jigs, fixtures, and bearing mounts. With its Class 6g thread fit and 70,000 psi tensile strength, it maintains integrity in vibrating environments common in automation equipment, packaging machinery, and robotic systems. The combination of metric coarse threading and hex socket drive enables quick maintenance while resisting loosening under dynamic loads.

Specification Summary & Compliance

This shoulder screw maintains Class 6g thread fit per metric standards with precise shoulder diameter tolerance (-0.025 to 0 mm) and shoulder length tolerance (0 to 0.05 mm). Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material traceability. The right-hand coarse thread (M8x1.25mm) and Rockwell B55 hardness confirm consistent performance in industrial applications requiring reliable fastening solutions.