S-97832A289 5/16"-18 ASME B18.3 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 and extended service life.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance under high-stress conditions.
- Precise Class 3A thread fit ensures tighter tolerances and secure, vibration-resistant fastening in critical assemblies.
- Easy installation and removal with a 3/16" hex drive and knurled head for improved grip and torque application.
- Accurate component alignment provided by the 2 1/8" shoulder length with tight diameter and length tolerances.
- Broad compatibility with 5/16"-18 UNC coarse threads, conforming to ASME B18.3 standards for consistent quality.
- Compliance with environmental regulations including RoHS 3 and REACH, ensuring safe and sustainable use in global markets.
Professional Applications & Engineering Value
This shoulder screw is engineered to address common challenges in precision machinery, such as misalignment and component wear. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, making it suitable for applications in moist or chemically aggressive settings. Its Class 3A thread fit and coarse UNC threads deliver secure, vibration-resistant connections, reducing the risk of loosening in dynamic systems like rotating assemblies or automation equipment. The knurled head and hex drive facilitate quick and reliable installation, while the precisely machined shoulder ensures accurate positioning of parts, minimizing downtime and maintenance costs in industrial operations.
Specification Summary & Compliance
This shoulder screw features a Class 3A thread fit with 5/16"-18 UNC coarse threads, ensuring high precision and interchangeability. Dimensional tolerances include a shoulder diameter of 3/8" (tolerance: -0.004" to -0.002") and shoulder length of 2 1/8" (tolerance: -0.005" to 0.005"). It complies with ASME B18.3 manufacturing specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements for environmental safety.
