S-91273A587 1/4"-28 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced durability and wear resistance from the black oxide finish, providing long-lasting performance
• High tensile strength of 70,000 psi ensures reliable fastening under heavy loads and stress
• Precise alignment and smooth rotation due to the knurled head and standard shoulder fit
• Easy installation and removal with hex drive socket head, reducing assembly time
• Accurate thread engagement with Class 2A fit and UNF fine thread for secure connections
• Compliance with environmental standards including RoHS 3 and REACH, ensuring safe usage

Professional Applications & Engineering Value

This shoulder screw is engineered to address common industrial challenges such as misalignment and component wear. The 18-8 stainless steel material offers excellent corrosion resistance, while the black oxide finish enhances surface durability, reducing friction in moving parts. With a 1/4"-28 UNF fine thread and 3/8" shoulder length, it provides precise positioning in machinery, automotive, and assembly applications. The socket head with hex drive allows for efficient torque application, minimizing installation errors and improving productivity in high-volume manufacturing settings.

Specification Summary & Compliance

This shoulder screw features a Class 2A thread fit with UNF standard threads, ensuring dimensional accuracy and reliable performance. Shoulder diameter tolerance ranges from -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005" for consistent quality. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting environmental and safety requirements for industrial use.