S-90265A121 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and reducing maintenance costs.
• Precise component alignment ensured by the 10mm shoulder length with controlled tolerances, minimizing assembly errors.
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for reliable load-bearing in demanding applications.
• Secure and non-slip installation provided by the knurled head and 2mm hex drive, allowing for high-torque fastening.
• Accurate and consistent threading with Class 5g6g metric coarse thread (M3x0.5), ensuring reliable engagement and interchangeability.
• Compliance with major environmental regulations including RoHS 3 and REACH, supporting your supply chain sustainability goals.
• Durable shoulder diameter of 4mm with tight tolerance, providing a stable bearing surface and extended service life.

Professional Applications & Engineering Value

This M3 shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel material offers excellent resistance to corrosion and oxidation, making it suitable for machinery, electronics, and automotive components exposed to moisture or chemicals. The 10mm shoulder length acts as a precise spacer or pivot, preventing axial movement and reducing wear on mated parts. Combined with the knurled head and 2mm hex drive, it ensures secure handling and installation even in high-vibration environments. The Class 5g6g thread fit and coarse M3x0.5 thread provide reliable fastening, streamlining production and minimizing the risk of thread stripping. Ideal for use in jigs, fixtures, and rotating assemblies, this precision shoulder screw enhances operational reliability and reduces long-term maintenance.

Specification Summary & Compliance

This shoulder screw features a Class 5g6g thread fit per metric standards, ensuring precise thread engagement. The shoulder diameter tolerance is -0.072 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, providing high dimensional accuracy. Manufactured from 18-8 stainless steel with a tensile strength of 70,000 psi and minimum shear strength of 35,000 psi. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards.