S-90298A874 3/4"-10 ASME B18.3 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and passivated finish, ideal for harsh industrial environments.
• Precise component alignment ensured by the Class 3A thread fit and standard shoulder, minimizing assembly errors.
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
• Secure and easy installation using the 1/2" hex drive and knurled head for improved grip and torque application.
• Reliable coarse threading with 3/4"-10 UNC right-hand threads for quick assembly and strong holding power.
• Dimensional stability with tight shoulder diameter and length tolerances for consistent fit in precision machinery.
• Compliance with industry standards including ASME B18.3, RoHS 3, and REACH for quality and environmental safety.

Professional Applications & Engineering Value

This 3/4"-10 UNC shoulder screw is engineered to address critical alignment and durability challenges in industrial settings. Made from 18-8 stainless steel with a passivated finish, it resists corrosion in moist or chemical-exposed environments, extending service life. The Class 3A thread fit and precisely machined shoulder ensure accurate positioning in assemblies like rotating shafts, pivots, and guides, reducing wear and maintenance. With a coarse thread design and 70,000 psi tensile strength, it provides robust fastening for heavy-duty equipment, while the socket head and knurling allow for efficient installation in confined spaces. Ideal for machinery, automotive, and aerospace applications, this screw delivers reliable performance where precision and strength are paramount.

Specification Summary & Compliance

This shoulder screw adheres to Class 3A thread fit tolerances for high precision, with UNC coarse threads (3/4"-10) and a right-hand direction. The shoulder features a diameter of 1" (tolerance: -0.001" to 0.001") and length of 1 3/4" (tolerance: -0.005" to 0.005") for consistent assembly. It meets ASME B18.3 specifications for dimensional standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material integrity.