S-90269A489 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance from 316 stainless steel and black oxide finish, ideal for harsh industrial environments
• Precise component alignment with 18mm shoulder length and tight diameter tolerance for stable assemblies
• High mechanical strength with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
• Secure installation and removal using standard 2mm hex drive with knurled head for enhanced grip
• Reliable thread engagement with Class 5g6g metric coarse thread fit ensuring consistent fastening performance
• Durability in aggressive conditions thanks to Rockwell B79 hardness and corrosion-resistant materials
• Compliance with environmental regulations including RoHS 3 and REACH for safe industrial use

Professional Applications & Engineering Value

This M3 shoulder screw delivers exceptional engineering value in precision mechanical systems where alignment and corrosion resistance are critical. The 316 stainless steel construction combined with black oxide finish provides outstanding protection against chemical exposure and moisture, making it ideal for machinery, medical devices, and marine equipment. The 18mm shoulder length with controlled tolerances ensures precise bearing surfaces and component spacing, while the Class 5g6g thread fit maintains reliable fastening in vibrating environments. The hex drive with knurled head allows for secure tool engagement during assembly, reducing installation errors in automated production lines.

Specification Summary & Compliance

This precision shoulder screw features M3x0.5 metric coarse threads with Class 5g6g thread fit per ISO standards. Shoulder diameter tolerance ranges from -0.072 to -0.01 mm with shoulder length tolerance of 0 to 0.25 mm. Manufactured from 316 stainless steel with black oxide finish, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for industrial safety and environmental responsibility.