S-90298A875 3/4"-10 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments.
• Exceptional load-bearing capacity thanks to 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under stress.
• Precise alignment and smooth rotation ensured by the 1" shoulder diameter with tight ±0.001" tolerance and standard shoulder fit.
• Secure, non-slip installation with a knurled hex socket head and 1/2" drive, reducing tool slippage and assembly errors.
• Durable, coarse UNC threading with Class 3A fit for quick assembly and strong engagement in demanding applications.
• Consistent dimensional accuracy across the 2" shoulder length (±0.005" tolerance) for repeatable positioning in machinery.
• Compliance with global standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.

Professional Applications & Engineering Value

This precision shoulder screw is engineered to address common industrial challenges such as misalignment, wear, and corrosion in high-stress assemblies. The 18-8 stainless steel construction and passivated finish provide excellent resistance to rust and chemicals, extending service life in environments like manufacturing equipment, automotive systems, and conveyor setups. The 3/4"-10 UNC coarse thread with Class 3A fit ensures rapid, secure fastening, while the precisely machined shoulder (1" diameter, 2" length) acts as a reliable pivot or spacer, reducing vibration and part movement. Ideal for heavy-duty applications, it enhances assembly reliability, minimizes downtime, and supports efficient production workflows with its knurled hex socket head for easy, tool-friendly installation.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit for high precision, with UNC coarse threads (3/4"-10 size) and tolerances including shoulder diameter of -0.001" to 0.001" and shoulder length of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring quality and safety for industrial use.