S-90269A917 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.
• High tensile and shear strength (70,000 psi tensile, 35,000 psi shear) ensures reliable performance under heavy loads.
• Precise shoulder fit with controlled diameter and length tolerances for accurate alignment in assemblies.
• Easy installation and removal thanks to the 12 mm hex drive and knurled head for improved grip.
• Durable thread engagement with Class 5g6g metric coarse threads providing secure fastening in various materials.
• Long service life supported by Rockwell B79 hardness, reducing wear in high-cycle applications.
• Global compliance assurance meeting ISO 7379, RoHS 3, and REACH standards for safe, regulated use.

Professional Applications & Engineering Value

This M20 shoulder screw is engineered to address critical alignment and load-bearing challenges in industrial settings. The 316 stainless steel material, combined with a black oxide finish, provides excellent resistance to corrosion and oxidation, making it suitable for applications in marine, chemical processing, and outdoor equipment. The precision shoulder with tight diameter and length tolerances ensures accurate component positioning, reducing assembly errors and enhancing machinery reliability. With a coarse thread pitch and Class 5g6g thread fit, it offers quick installation and strong holding power in metals and composites, while the knurled head and hex drive facilitate easy handling in confined spaces. Ideal for use in pivots, rotating shafts, and structural joints, this fastener delivers consistent performance where durability and precision are paramount.

Specification Summary & Compliance

This shoulder screw features a metric M20x2.5 mm coarse thread with Class 5g6g tolerance for precise fit. The shoulder diameter is 24 mm with a tolerance of -0.072 to -0.01 mm, and the shoulder length is 50 mm with a tolerance of 0 to 0.25 mm, ensuring high dimensional accuracy. It complies with ISO 7379 manufacturing standards and is verified to be RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, meeting environmental and safety regulations for industrial use.