S-90969A340 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
- Exceptional durability with 140,000 psi tensile strength and Rockwell C30 hardness for reliable performance in high-stress applications.
- Superior corrosion resistance from the black oxide finish, extending service life in harsh industrial environments.
- Precise alignment and smooth rotation ensured by the Class 3A thread fit and standard shoulder fit, reducing assembly time and wear.
- Easy installation and removal with a 3/16" hex drive and knurled head for improved grip, even in confined spaces.
- Optimized for space-constrained designs thanks to the ultra-low socket head profile and coarse UNC threads for quick fastening.
- Consistent dimensional accuracy with tight shoulder diameter and length tolerances, ensuring reliable fit in precision assemblies.
- Environmentally compliant with RoHS 3 and REACH standards, meeting global regulatory requirements for safe use.
Professional Applications & Engineering Value
This alloy steel shoulder screw is engineered to address common challenges in mechanical systems, such as misalignment and component wear. The 5/16"-18 UNC coarse thread with Class 3A fit provides secure, vibration-resistant fastening, ideal for moving parts in machinery, automotive assemblies, and robotics. The black oxide finish enhances corrosion resistance, crucial for outdoor or humid conditions, while the 1" shoulder length acts as a precise pivot or spacer, reducing friction and extending equipment life. Its ultra-low socket head and knurled texture facilitate quick maintenance, making it a reliable choice for high-performance industrial shoulder screws in demanding applications.
Specification Summary & Compliance
This shoulder screw features precise dimensions, including a thread diameter of 0.313" with Class 3A thread fit for tight tolerances, and shoulder diameter and length held to specific tolerances (e.g., -0.004" to -0.002" for diameter). It adheres to UNC thread standards with coarse spacing and right-hand direction. Manufactured from alloy steel, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safety and sustainability in industrial use.
