S-90278A507 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and extended service life
• Precise component alignment enabled by the accurately machined shoulder with tight diameter tolerance (-0.025 to 0 mm), reducing assembly errors
• High mechanical strength offering 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under load
• Secure, high-torque installation using the 2.5 mm hex socket drive, minimizing stripping and ensuring firm fastening
• Optimized for metric assemblies with M4 x 0.7mm coarse thread and Class 6g fit, ensuring compatibility and easy installation
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe use in regulated industries
• Versatile shoulder length of 45mm provides stable bearing surfaces for rotating parts and precise spacing in mechanical designs

Professional Applications & Engineering Value

This M4 shoulder screw delivers critical engineering value in applications requiring exact positioning and rotational support. Manufactured from 18-8 stainless steel, it resists oxidation and chemical exposure, making it suitable for automation equipment, precision instruments, and food processing machinery. The 45mm shoulder length with precise fit acts as a reliable axle or pivot, eliminating the need for additional bushings and reducing assembly complexity. The hex socket drive allows for high torque application in confined spaces, while the Class 6g thread with coarse pitch ensures quick and secure fastening. Its 70,000 psi tensile strength guarantees durability in dynamic loads, solving common failure points in moving assemblies.

Specification Summary & Compliance

This precision shoulder screw features M4 x 0.7mm coarse metric thread with Class 6g tolerance. The shoulder diameter is controlled to -0.025 to 0 mm tolerance, and shoulder length is maintained within 0 to 0.05 mm tolerance for precise fit. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions are met for industrial use.