S-91273A278 3/4"-10 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh or washdown environments.
• Enhanced assembly precision with a Class 2A thread fit ensuring consistent, reliable engagement and reduced cross-threading.
• High mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for demanding load-bearing applications.
• Secure, non-slip grip from the knurled hex socket head, allowing for high-torque installation and removal with a standard 3/8" drive.
• Accurate component alignment and rotation provided by the 2 1/2" long shoulder with tight diameter tolerance.
• Broad industrial compatibility with UNC coarse threads and a right-hand thread direction for common machinery and equipment.
• Environmental and regulatory safety with full compliance to RoHS 3 and REACH, ensuring no hazardous substances.

Professional Applications & Engineering Value

This 3/4"-10 UNC shoulder screw is engineered to solve critical alignment and pivot point challenges in industrial machinery, automation systems, and precision assemblies. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, extending service life in demanding conditions. The 2 1/2" shoulder length acts as a precise axle or dowel, maintaining part alignment and reducing wear on moving components. Paired with a hex socket head and knurled texture, it ensures secure fastening in high-vibration environments, while the Class 2A thread fit guarantees easy assembly without sacrificing strength. This combination of features makes it a reliable choice for precision shoulder screw applications where dimensional stability and durability are paramount.

Specification Summary & Compliance

This shoulder screw adheres to UNC coarse thread standards with a Class 2A thread fit for consistent assembly. The shoulder diameter is manufactured to a tight tolerance of -0.004" to -0.002", and the shoulder length is held to -0.005" to 0.005". The material is heat treated to a Rockwell B55 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of restricted hazardous substances.