S-91273A174 1/4"-28 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 assembly precision with Class 2A thread fit and fine UNF threads for secure, vibration-resistant fastening
- High load-bearing capacity supported by 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Secure tool engagement featuring a hex socket drive and knurled head to prevent slipping during installation
- Accurate component alignment due to the precisely machined 1-1/2" shoulder with tight diameter and length tolerances
- Long-term reliability with Rockwell B55 hardness ensuring durability and resistance to wear
- Global compliance assurance meeting RoHS 3 and REACH regulations for safe, sustainable use
Professional Applications & Engineering Value
This socket head shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 18-8 stainless steel material provides excellent resistance to corrosion and oxidation, making it suitable for applications in industrial equipment, automotive assemblies, and electronic enclosures where environmental factors are a concern. The 1/4"-28 UNF fine thread ensures a tight, secure fit that minimizes loosening under vibration, while the 1-1/2" shoulder length with controlled tolerances allows for precise positioning of moving parts like gears, pulleys, and bearings. This design reduces wear, improves operational accuracy, and extends service life, offering a reliable solution for engineers seeking high tensile strength and compliance with international standards.
Specification Summary & Compliance
The screw adheres to Class 2A thread fit and UNF thread standards for consistent performance. Shoulder diameter tolerance is -0.004" to -0.002", and shoulder length tolerance is -0.005" to 0.005", ensuring precise manufacturing. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for global industrial and commercial use without hazardous substances.
