S-91273A563 1/4"-20 Shoulder Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and reducing replacement frequency.
• Enhanced durability and wear resistance from the black oxide finish, which also minimizes light reflection and provides a sleek appearance.
• High-strength performance offering 70,000 psi tensile strength and 35,000 psi minimum shear strength for reliable load-bearing in demanding applications.
• Precise alignment and reduced wear due to the 3/8" shoulder length and standard shoulder fit, ensuring stable component positioning.
• Secure and efficient installation with the hex socket drive and 1/8" drive size, allowing for high torque application without slippage.
• Wide compatibility and easy assembly with UNC coarse 1/4"-20 threads and Class 2A fit, facilitating quick fastening in various industrial setups.
• Improved grip and handling from the knurled head texture, enabling easier manual adjustments in tight spaces.

Professional Applications & Engineering Value

This 1/4"-20 shoulder screw is engineered to address common industrial challenges such as misalignment and component wear in machinery. Made from 18-8 stainless steel with a black oxide finish, it resists corrosion and extends service life in humid or chemical-exposed environments. The 3/8" shoulder length provides a precise pivot or bearing surface, reducing friction and maintaining alignment in assemblies like rotating shafts, gears, and linkages. Featuring a hex socket drive and UNC coarse threads, it ensures quick, secure fastening in automotive, aerospace, and manufacturing equipment, minimizing downtime and enhancing operational reliability.

Specification Summary & Compliance

This shoulder screw adheres to Class 2A thread fit for consistent engagement and includes a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" for precision. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring environmental safety and regulatory alignment in global markets.