S-90311A145 10-24 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 316 Stainless Steel construction, ideal for harsh environments and extended service life.
• Vibration-resistant locking provided by the permanent nylon patch, preventing loosening in dynamic applications from -50° to 250°F.
• High-strength performance with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding mechanical assemblies.
• Precise alignment and smooth rotation enabled by the precision shoulder with controlled diameter and length tolerances.
• Reliable, high-accuracy threading with Class 3A UNC coarse thread fit, ensuring consistent engagement and reduced risk of cross-threading.
• Secure and easy installation with a knurled hex socket head for improved grip and torque application without slippage.
• Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing quality and environmental responsibility.

Professional Applications & Engineering Value

This 10-24 UNC shoulder screw is engineered to address critical challenges in precision machinery and industrial equipment. The 316 Stainless Steel material offers exceptional resistance to corrosion and chemicals, making it suitable for applications in marine, chemical processing, and food-grade environments. The integrated nylon patch thread locker secures the fastener against vibrations and thermal cycling, eliminating the need for secondary locking mechanisms and reducing maintenance. The knurled socket head ensures reliable torque transmission during assembly, while the precision-machined shoulder provides accurate component positioning and acts as a pivot or bearing surface. Ideal for use in robotic arms, conveyor systems, and automated assemblies, this screw enhances operational reliability and reduces downtime in high-stress applications.

Specification Summary & Compliance

This shoulder screw features a Class 3A thread fit for high precision and a UNC coarse thread (10-24) for robust engagement. The shoulder diameter is 1/4" with a tolerance of -0.004" to -0.002", and the shoulder length is 3/4" with a tolerance of -0.005" to 0.005". Manufactured in compliance with ASME B18.3 specifications, it also meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safety and regulatory adherence for global supply chains.