S-97832A285 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 environments and reducing replacement frequency.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi minimum shear strength for reliable performance under high stress.
- Precise Class 3A thread fit ensures secure, vibration-resistant assemblies and reduces the risk of loosening in dynamic applications.
- Knurled socket head with hex drive provides a non-slip grip for easy installation and removal, even in tight spaces.
- Robust shoulder design with a 3/8" diameter and 1 5/8" length acts as a precise pivot, spacer, or axle, minimizing component wear.
- Compliance with ASME B18.3 standards guarantees dimensional consistency and interchangeability for seamless integration.
- Environmental regulation compliance (RoHS 3 & REACH) ensures safety and suitability for global industrial markets.
Professional Applications & Engineering Value
This 18-8 Stainless Steel shoulder screw is engineered to address critical challenges in precision assemblies, such as misalignment and component wear. The 5/16"-18 UNC coarse thread with a Class 3A fit provides excellent engagement and resistance to vibrational loosening in machinery and automation equipment. The integral 3/8" shoulder diameter serves as a durable bearing surface or pivot point in linkages, gears, and rotating mechanisms, reducing the need for additional bushings. Manufactured to ASME B18.3 specifications, it ensures reliable performance in industrial fasteners for automotive, aerospace, and heavy machinery applications, where corrosion-resistant properties and high tensile strength are paramount for longevity and safety.
Specification Summary & Compliance
This shoulder screw adheres to precise dimensional tolerances, including a Class 3A thread fit for superior engagement and a shoulder diameter tolerance of -0.004" to -0.002". It conforms to ASME B18.3 manufacturing standards and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material reliability.
