S-91273A593 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
- Enhanced corrosion resistance with 18-8 stainless steel construction and black oxide finish, ideal for harsh industrial environments
- Superior load-bearing capability with 70,000 psi tensile strength and 35,000 psi shear strength for reliable performance under stress
- Precise alignment and smooth rotation thanks to the standard shoulder fit and knurled head texture for secure handling
- Easy installation and removal using a standard 5/32" hex drive, reducing assembly time and tool wear
- Consistent thread engagement with Class 2A UNC coarse threads ensuring secure fastening in various materials
- Durable wear resistance from Rockwell B55 hardness, extending service life in high-cycle applications
- Compliance with global regulations including RoHS 3 and REACH, supporting sustainable and safe manufacturing practices
Professional Applications & Engineering Value
This 5/16"-18 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision machinery. The 18-8 stainless steel material, combined with a black oxide finish, provides excellent resistance to corrosion and wear, making it suitable for automotive, aerospace, and industrial equipment where exposure to moisture and chemicals is common. The socket head design with hex drive allows for tight spaces and high-torque applications, while the knurled head texture enhances grip during manual adjustments. The shoulder feature ensures accurate component positioning, reducing misalignment and vibration issues in assemblies like pivots, gears, and rotating shafts. By offering reliable tensile and shear strength, this screw minimizes failure risks in dynamic loads, supporting efficient maintenance and long-term operational stability.
Specification Summary & Compliance
This shoulder screw adheres to Class 2A thread fit tolerances for consistent performance in UNC coarse threads. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance standards, ensuring environmental safety and regulatory alignment. Manufacturing specifications include precise shoulder diameter and length tolerances, supporting reliable integration in industrial fastening applications.
