S-99154A390 10-32 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh or washdown environments
• Precise component alignment ensured by the 1/4" diameter shoulder with a tight tolerance fit (-0.001" to 0")
• High mechanical strength with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under load
• Secure, fine-thread engagement provided by the 10-32 UNF thread with Class 2A fit, reducing the risk of loosening in vibrating applications
• Low-profile socket head design allows for installation in confined spaces while providing a clean, finished appearance
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safety and suitability for global industrial markets
• Extended shoulder length of 1/2" offers stable bearing surface for rotating parts like gears and pulleys

Professional Applications & Engineering Value

This precision shoulder screw is engineered to solve critical alignment and pivot point challenges in mechanical assemblies. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it suitable for food processing, medical devices, and outdoor equipment. The fine thread (10-32 UNF) and Class 2A fit ensure tight, secure fastening in applications subject to vibration, such as motors and conveyors. The precisely machined 1/4" diameter shoulder acts as a reliable datum for locating parts like bearings, linkages, and cams, eliminating misalignment and reducing wear. Its low-profile socket head is ideal for compact designs where clearance is limited, while the right-hand thread offers standard, intuitive installation. This screw delivers consistent performance in demanding industrial applications, from automation machinery to precision instruments.

Specification Summary & Compliance

This shoulder screw adheres to UNF fine thread standards with a Class 2A thread fit for consistent, precise engagement. The shoulder diameter is manufactured to a tight tolerance of -0.001" to 0", and the shoulder length is held to 0" to 0.002" tolerance, ensuring exacting dimensional accuracy. It is fully RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for industrial components.