S-90278A550 M3 Shoulder Screws

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments and washdown applications.
• Precise component alignment enabled by the smooth, accurately machined shoulder with tight diameter and length tolerances for reduced assembly vibration.
• High-strength performance with a tensile strength of 70,000 psi and Rockwell B55 hardness for reliable load-bearing in demanding applications.
• Secure, tamper-resistant fastening using the internal hex socket drive, providing a clean profile and high torque transmission.
• Superior thread engagement with a Class 6g metric coarse thread (M3x0.5mm), ensuring consistent and reliable mating with nuts and tapped holes.
• Broad industry compatibility as a right-hand thread metric shoulder screw, making it a versatile component for machinery, jigs, and pivots.
• Compliance with environmental regulations, being RoHS 3 and REACH compliant for use in regulated markets and sustainable manufacturing.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to solve critical alignment and pivot point challenges in industrial machinery and automated systems. The 30mm shoulder length with its precise fit acts as a durable axle or guide pin, eliminating the need for additional bushings and reducing component count. Manufactured from 18-8 stainless steel, it provides excellent resistance to rust and corrosion, which is vital for food processing, packaging, and outdoor equipment. The hex socket head allows for compact installation in tight spaces while the Class 6g thread ensures a secure fastening that can withstand vibrational forces. This combination of a robust shoulder diameter and high tensile strength makes it an ideal choice for securing moving parts in jigs, fixtures, and conveyor systems, enhancing machine longevity and reducing maintenance downtime.

Specification Summary & Compliance

This M3 shoulder screw features a Class 6g thread fit per metric standards, with a coarse 0.5 mm pitch. The shoulder is manufactured to precise tolerances: diameter tolerance of -0.025 to 0 mm and length tolerance of 0 to 0.05 mm. It is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances for use in global industrial markets.