S-91273A368 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• High strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance
• Precise alignment and spacing thanks to the 4mm shoulder diameter with tight tolerances (-0.04 to -0.01 mm)
• Easy installation and removal using the 2mm hex socket drive and knurled head for improved grip
• Accurate thread engagement with Class 5g6g thread fit and coarse 0.7mm pitch for quick assembly
• Consistent dimensional stability from the 14mm shoulder length with minimal tolerance (0 to 0.25 mm)
• Compliance with environmental standards including RoHS 3 and REACH for safe, sustainable use

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address common industrial challenges like misalignment and component wear. Made from 18-8 stainless steel, it offers excellent corrosion resistance, making it suitable for machinery, automotive assemblies, and electronic enclosures exposed to moisture or chemicals. The hex socket drive and knurled head ensure secure fastening in tight spaces, while the Class 5g6g thread with coarse pitch provides reliable holding power. The precisely machined shoulder acts as a pivot or spacer, reducing friction and simplifying assembly in precision equipment, thereby enhancing operational efficiency and longevity.

Specification Summary & Compliance

This shoulder screw features a metric thread with M4 size, 0.7mm pitch, and Class 5g6g thread fit per standard tolerances. The shoulder diameter is 4mm with a tolerance of -0.04 to -0.01 mm, and shoulder length is 14mm with 0 to 0.25 mm tolerance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial use.