S-90323A323 M4 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ensuring long-lasting performance in harsh environments.
• High tensile strength of 80,000 psi provides reliable load-bearing capacity for demanding mechanical assemblies.
• Precise Class 6g thread fit guarantees consistent engagement and reduces the risk of cross-threading during installation.
• Accurate shoulder dimensions with tight tolerances enable exact positioning and alignment in precision machinery.
• Durable Rockwell B95 hardness offers excellent wear resistance, extending the screw's service life under repetitive stress.
• Low-profile socket head with hex drive allows for easy installation in confined spaces using standard 2.5 mm tools.
• Compliance with RoHS 3 and REACH regulations ensures environmental safety and meets global industry standards.

Professional Applications & Engineering Value

This M4 shoulder screw is engineered to address critical alignment and durability challenges in precision industrial applications. Constructed from 18-8 stainless steel with a passivated finish, it resists corrosion and chemical exposure, making it ideal for electronics, automotive, and medical equipment. The Class 6g thread fit and precisely machined shoulder—with diameters and lengths held to tight tolerances—ensure minimal play and secure component positioning. Its low-profile socket head and hex drive facilitate quick assembly in space-constrained designs, while the high tensile strength and hardness prevent failure under dynamic loads, reducing maintenance needs and improving machine uptime.

Specification Summary & Compliance

This precision shoulder screw features an M4 x 0.7 mm coarse metric thread with Class 6g fit per ISO standards, ensuring dimensional accuracy. Shoulder diameter is 5 mm with a tolerance of -0.025 to 0 mm, and shoulder length is 6 mm with a tolerance of 0 to 0.05 mm for precise fit. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for regulated industries and environmentally conscious procurement.