S-91273A783 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments.
• Precise alignment and secure component positioning thanks to the 10mm shoulder with tight diameter tolerance for reduced assembly play.
• High-strength performance delivering 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications.
• Enhanced durability and wear resistance from Rockwell B55 hardness, ensuring long service life under repetitive stress.
• Reliable and consistent threading with Class 5g6g metric coarse thread fit, facilitating smooth installation and secure fastening.
• Secure, non-slip drive engagement via the 2 mm hex socket and knurled head, allowing for high-torque application without stripping.
• Compliance with global environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and durability challenges in industrial applications. The 18-8 stainless steel material, combined with a black oxide finish, provides excellent resistance to corrosion and oxidation, making it suitable for machinery, automotive assemblies, and electronic enclosures exposed to moisture or chemicals. The precision 10mm shoulder length acts as a dependable pivot or spacer, minimizing misalignment and bearing wear in rotating parts. With a Class 5g6g thread fit and coarse thread pitch, it ensures quick, secure fastening even in high-vibration settings, reducing maintenance downtime and improving operational reliability for engineers and OEMs.

Specification Summary & Compliance

This metric shoulder screw features an M4 x 0.7mm thread with Class 5g6g thread fit and precise shoulder diameter tolerance of -0.04 to -0.01 mm. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards. Manufactured to deliver consistent tensile strength and dimensional accuracy, it is ideal for applications requiring reliable socket head fastening solutions.