S-90298A552 10-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel and passivated finish for extended service life in harsh environments.
• Exceptional thread reliability with Class 3A fit and UNC coarse threads, ensuring secure, vibration-resistant fastening.
• High-strength construction delivering 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
• Precise shoulder alignment with tight diameter (±0.001") and length (±0.005") tolerances for accurate component positioning.
• Easy installation and removal featuring a knurled, hex socket head (1/8" drive) for secure tool grip and efficient assembly.
• Broad industry compliance meeting ASME B18.3 standards, RoHS 3, and REACH for quality assurance and environmental safety.
• Versatile right-hand threading with a 3" shoulder length, ideal for pivots, axles, and spacers in machinery and assemblies.

Professional Applications & Engineering Value

This 10-24 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. The 18-8 stainless steel construction, combined with a passivated finish, provides excellent resistance to oxidation and chemical exposure, making it suitable for automotive, aerospace, and food processing equipment. The Class 3A thread fit and precisely machined shoulder—with minimal diameter and length tolerances—ensure consistent performance as a pivot, guide, or spacer in assemblies requiring exact rotational or linear movement. Its socket head with knurling enhances grip during installation, reducing slippage in high-torque applications. By integrating high tensile strength and compliance with ASME B18.3, this screw minimizes downtime and maintenance costs in precision machinery.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit per UNC standards, with shoulder diameter tolerance of -0.001" to 0.001" and length tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations for environmental safety.