S-90298A550 10-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Enhanced Corrosion Resistance: Crafted from 18-8 Stainless Steel with a passivated finish to ensure long-term reliability in harsh industrial environments.
• Superior Load-Bearing Shoulder: Features a precision-ground 2-1/2" shoulder with a tight length tolerance of ±0.005" for accurate component alignment and spacing.
• High-Strength Thread Engagement: 10-24 UNC coarse threads with a Class 3A fit provide secure, vibration-resistant fastening and easy assembly.
• Exceptional Mechanical Durability: With a 70,000 psi tensile strength and Rockwell B55 hardness, this screw withstands high stress and repeated use.
• Secure and Easy Installation: The hex socket drive and knurled head offer superior torque transmission and grip, preventing tool slippage.
• Rigorous Quality Assurance: Manufactured to meet ASME B18.3 specifications, ensuring consistent dimensional accuracy and performance.
• Global Regulatory Compliance: RoHS 3 and REACH compliant for safe use in regulated markets and environmentally conscious applications.

Professional Applications & Engineering Value

This stainless steel shoulder screw is engineered to address critical alignment and pivot point requirements in precision assemblies. The 2-1/2" shoulder length with minimal tolerance acts as a precise axle or spacer, eliminating misalignment in machinery, conveyor systems, and robotic arms. The 10-24 UNC coarse thread and Class 3A fit ensure rapid, secure fastening even in high-vibration environments, reducing maintenance downtime. The passivated finish on the 18-8 stainless steel provides excellent resistance to oxidation and chemical exposure, making it ideal for food processing, packaging, and automotive applications where corrosion and contamination are concerns. The combination of high tensile strength and a knurled hex socket head delivers reliable performance in demanding operational cycles.

Specification Summary & Compliance

This shoulder screw adheres to strict dimensional standards, including a Class 3A thread fit for superior engagement, a shoulder diameter tolerance of -0.001" to 0.001", and a shoulder length tolerance of -0.005" to 0.005". It is manufactured in compliance with the ASME B18.3 standard and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring it is free from hazardous substances and suitable for global industrial use.