S-91273A159 1/4"-20 Shoulder Screws
Shoulder Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
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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 Rockwell B55 hardness, extending service life in high-stress applications.
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance.
- Secure and easy installation using a hex drive and knurled head for improved grip and torque application.
- Precise alignment and spacing ensured by the 2 3/4" shoulder with tight tolerances for consistent assembly.
- Wide compatibility with UNC coarse threads and Class 2A fit, facilitating easy integration into standard systems.
- Environmental compliance meeting RoHS 3 and REACH standards for safe and sustainable use.
Professional Applications & Engineering Value
This stainless steel shoulder screw is engineered to address critical alignment and rotational stability challenges in precision machinery, such as in automated assembly systems, conveyor mechanisms, and robotic arms. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, reducing maintenance needs in humid or chemically exposed settings. The 2 3/4" shoulder length with minimal tolerances ensures precise component spacing, minimizing misalignment and vibration issues. Combined with a knurled hex socket head and UNC coarse threads, it offers quick, secure fastening that withstands high torque and repetitive motion, enhancing operational efficiency and reducing downtime in industrial applications.
Specification Summary & Compliance
This shoulder screw adheres to Class 2A thread fit and UNC coarse thread standards, with precise dimensional control including shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005". It is manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
