S-97345A681 1/4"-20 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 316 stainless steel construction, ideal for harsh environments and extended service life.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for reliable performance in heavy-duty applications.
- Precise Class 3A thread fit ensures tight tolerances and secure fastening, reducing the risk of loosening under vibration.
- Easy installation and removal with a 3/16" hex drive and knurled head for improved grip and torque application.
- Robust shoulder design provides stable bearing surfaces and accurate alignment in assemblies, minimizing wear.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and environmental responsibility.
- Coarse UNC threading allows for quick assembly and disassembly, enhancing operational efficiency.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address common industrial challenges such as misalignment, corrosion, and high-stress conditions. Its Class 3A thread fit and UNC coarse thread provide reliable fastening in machinery, automotive, and aerospace applications, where precision and durability are critical. The knurled head and hex drive facilitate easy handling, even in confined spaces, while the corrosion-resistant material ensures longevity in moist or chemical-exposed environments. By offering a combination of high tensile strength and compliance with ASME B18.3 standards, this fastener reduces maintenance needs and enhances overall system reliability, making it a cost-effective solution for demanding engineering projects.
Specification Summary & Compliance
This shoulder screw adheres to precise dimensional tolerances, including a Class 3A thread fit for superior accuracy and a shoulder diameter tolerance of -0.004" to -0.002". It meets ASME B18.3 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industry-standard performance.
