S-91273A232 1/2"-13 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, ensuring long-term reliability in harsh environments.
- Precise component alignment thanks to the 1-3/4" shoulder with tight ±0.005" length tolerance, minimizing assembly play.
- High mechanical strength delivering 70,000 psi tensile and 35,000 psi shear strength for demanding load-bearing applications.
- Secure, high-torque installation enabled by the 1/4" hex socket drive and knurled head for improved grip.
- Reliable thread engagement with Class 2A fit and 1/2"-13 UNC coarse threads, reducing cross-threading risks.
- Consistent hardness and wear resistance from Rockwell B55 rating, extending service life under repetitive use.
- Environmental and regulatory compliance with RoHS 3 and REACH, meeting international standards for safe usage.
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery, automated systems, and precision equipment. The 1-3/4" shoulder length with minimal tolerance ensures exact positioning of rotating parts, gears, and linkages, eliminating misalignment and reducing wear. The UNC coarse threads and Class 2A thread fit provide quick, secure fastening even in high-vibration environments, while the hex socket head allows for flush mounting and easy access in confined spaces. With high tensile and shear strength, it supports heavy dynamic loads, making it ideal for pivots, axles, and assembly jigs where failure is not an option.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent engagement. The shoulder diameter tolerance is controlled between -0.004" to -0.002", and shoulder length tolerance is held within ±0.005" for precision assembly. Manufactured in compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free of restricted hazardous substances and safe for various industrial applications.
