S-91273A325 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise component alignment ensured by the 9mm shoulder with tight diameter tolerance (-0.04 to -0.01 mm)
• High-strength performance with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications
• Secure, non-slip fastening provided by the knurled head and 2mm hex socket drive
• Reliable thread engagement with Class 5g6g fit and coarse M3x0.5 thread for quick assembly
• Enhanced durability from Rockwell B55 hardness, maintaining integrity under repeated use
• Compliance with environmental regulations including RoHS 3 and REACH for global market acceptance

Professional Applications & Engineering Value

This precision M3 shoulder screw delivers exceptional engineering value in mechanical assemblies requiring accurate spacing and alignment. The 18-8 stainless steel material provides excellent corrosion resistance, making it suitable for manufacturing equipment, automation systems, and electronic enclosures exposed to moisture or chemicals. The 9mm shoulder length with controlled tolerances ensures precise location of rotating components like gears and pulleys, eliminating the need for additional spacers. The coarse metric thread (M3x0.5) facilitates rapid installation in production environments, while the knurled head and hex drive prevent tool slippage during torque application. These features collectively solve critical assembly challenges by reducing installation time, minimizing component wear, and maintaining dimensional stability in high-vibration applications.

Specification Summary & Compliance

This shoulder screw features Class 5g6g thread fit per metric standards, ensuring consistent engagement and interchangeability. Shoulder diameter tolerance is maintained at -0.04 to -0.01 mm with shoulder length tolerance of 0 to 0.25 mm for precision alignment applications. The product is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for restricted substance-controlled environments and international industrial markets.