S-91273A305 5/16"-18 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 for long-lasting performance in harsh industrial environments
- Enhanced torque transmission through the 5/32" hex socket drive, preventing stripping and ensuring secure fastening
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi shear strength for demanding applications
- Precise component alignment enabled by the standardized shoulder diameter and length with tight tolerances
- Quick assembly efficiency with coarse UNC threads and Class 2A fit for faster installation and reduced labor time
- Improved grip and handling thanks to the knurled head texture, even when wearing gloves
- Regulatory peace of mind with full compliance to RoHS 3 and REACH environmental standards
Professional Applications & Engineering Value
This 18-8 stainless steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery and precision equipment. The 5/16"-18 UNC coarse thread ensures rapid installation while maintaining Class 2A thread fit accuracy, reducing assembly errors. The integrated shoulder acts as a precise pivot or spacer, preventing component misalignment in rotating assemblies like conveyor systems, motor mounts, and automation guides. With Rockwell B55 hardness and corrosion-resistant properties, it withstands operational stresses and harsh conditions, minimizing maintenance downtime. The hex socket drive and knurled head provide reliable torque application, making it ideal for high-vibration environments where fastener integrity is paramount.
Specification Summary & Compliance
This shoulder screw maintains Class 2A thread fit per UNC standards with a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005" for precision assembly. Manufactured to industrial fastener specifications, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material sustainability.
