S-90278A326 M4 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 8mm shoulder with tight diameter tolerance (-0.025 to 0 mm)
• High tensile strength of 70,000 psi provides reliable load-bearing capacity for demanding applications
• Rockwell B55 hardness offers excellent durability and resistance to wear over repeated use
• Secure hex socket drive allows for easy installation with standard 2.5mm tools and prevents stripping
• Class 6g thread fit guarantees consistent, vibration-resistant fastening in metric assemblies
• Compliance with RoHS 3 and REACH ensures environmental safety and regulatory acceptance

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 18-8 stainless steel material provides exceptional corrosion resistance, making it suitable for automotive, electronics, and medical equipment where exposure to moisture or chemicals is common. The 8mm shoulder length with precise tolerances acts as a reliable pivot or spacer, reducing wear on moving parts and maintaining exact positioning in assemblies. Combined with a coarse 0.7mm pitch thread and hex socket drive, it ensures quick, secure installation and long-term performance in high-stress environments, minimizing maintenance downtime and enhancing operational reliability.

Specification Summary & Compliance

This shoulder screw features a Class 6g thread fit per metric standards, with a shoulder diameter tolerance of -0.025 to 0 mm and shoulder length tolerance of 0 to 0.05 mm for precise engineering applications. It is manufactured to meet RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring adherence to environmental and safety regulations without compromising on performance.