S-91273A773 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Corrosion-resistant 18-8 Stainless Steel construction ensures long-term reliability in harsh industrial environments
• Black Oxide finish provides enhanced wear resistance while maintaining consistent performance under frequent assembly/disassembly
• Precision Class 5g6g thread fit guarantees secure fastening with minimal vibration loosening in machinery applications
• 70,000 psi tensile strength with Rockwell B55 hardness delivers exceptional load-bearing capacity for demanding mechanical assemblies
• Knurled socket head with 2mm hex drive enables secure tool engagement and prevents stripping during high-torque installation
• 6mm shoulder length with tight diameter tolerance provides accurate component alignment and rotational stability
• Full RoHS 3 and REACH compliance meets international environmental standards for global manufacturing operations

Professional Applications & Engineering Value

This M3 shoulder screw delivers critical engineering solutions for precision assembly challenges. The 18-8 stainless steel core combined with black oxide surface treatment creates a durable fastening system resistant to corrosion and wear in automated equipment, precision instruments, and conveyor systems. The coarse metric thread (M3 x 0.5mm) ensures rapid installation while maintaining Class 5g6g thread accuracy for vibration-resistant connections. The 6mm shoulder length with controlled tolerances provides precise component spacing and rotational alignment, eliminating the need for additional spacers in complex mechanical assemblies. The socket head design with knurled texture guarantees reliable tool engagement, reducing installation time and preventing damage in high-volume production environments.

Specification Summary & Compliance

Manufactured to precise metric dimensions including M3 x 0.5mm thread with Class 5g6g thread fit, 3mm shoulder diameter (-0.04 to -0.01 mm tolerance), and 6mm shoulder length (0 to 0.25 mm tolerance). Meets mechanical performance standards with 70,000 psi tensile strength and 35,000 psi minimum shear strength. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for global industrial applications.