S-90269A921 M20 ISO 7379 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 stainless steel construction and black oxide finish, ideal for harsh industrial environments
• Precise component positioning thanks to the knurled head and standard shoulder fit, ensuring accurate alignment in assemblies
• High-strength performance with 70,000 psi tensile strength and Rockwell B79 hardness for reliable, durable fastening
• Easy installation and removal using the 12 mm hex drive socket head, reducing assembly time and tool wear
• Consistent thread engagement with Class 5g6g metric coarse threads, providing secure fastening and vibration resistance
• Broad industry compliance meeting ISO 7379 standards, RoHS 3, and REACH for global regulatory acceptance
• Optimized shoulder dimensions with tight tolerances for stable support and reduced wear in dynamic applications

Professional Applications & Engineering Value

This M20x2.5 shoulder screw is engineered to address critical challenges in precision machinery and industrial equipment. The 316 stainless steel material, combined with a black oxide finish, provides exceptional resistance to corrosion and chemicals, extending service life in demanding conditions like marine or chemical processing. The knurled head enhances grip during manual adjustments, while the standard shoulder ensures accurate component spacing and alignment, minimizing misalignment and wear in rotating assemblies. With a hex drive socket head, it allows for high-torque installation without slippage, making it ideal for applications requiring reliable shoulder positioning and repeated disassembly. Its metric coarse threads and high tensile strength support heavy loads, reducing the risk of failure in automotive, aerospace, and manufacturing systems.

Specification Summary & Compliance

This shoulder screw features M20x2.5 metric coarse threads with a Class 5g6g thread fit for precise tolerance control. The shoulder diameter tolerance ranges from -0.072 to -0.01 mm, and shoulder length tolerance is 0 to 0.25 mm, ensuring consistent performance. It complies with ISO 7379 manufacturing standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, supporting environmental and safety regulations for global use.