S-90292A120 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
- Exceptional strength and durability with 130,000 psi tensile and 65,000 psi shear strength, ideal for heavy-duty applications
- Superior corrosion resistance from 17-4 PH Stainless Steel, ensuring long-term reliability in harsh environments
- Precise Class 3A thread fit for secure, vibration-resistant assemblies and reduced risk of loosening
- Easy installation and removal with a 5/32" hex drive and knurled head for improved grip and torque application
- Accurate alignment and spacing provided by the 1/2" shoulder length, minimizing component misalignment
- Broad compliance with ASME B18.3, RoHS 3, and REACH standards, ensuring safety and regulatory adherence
- Optimized for coarse threading with 1/4"-20 UNC threads, facilitating quick assembly in industrial settings
Professional Applications & Engineering Value
This 17-4 PH Stainless Steel shoulder screw is engineered to address critical challenges in industrial applications where high strength, precision, and corrosion resistance are paramount. The Class 3A thread fit and UNC coarse threads ensure reliable fastening in machinery, automotive, and aerospace components, reducing the risk of thread stripping under stress. With a Rockwell C28 hardness and robust 130,000 psi tensile strength, it withstands extreme loads and vibrations, while the knurled head and hex drive simplify maintenance in tight spaces. Ideal for use in precision assemblies, such as rotating shafts and bearing mounts, this screw enhances operational efficiency and longevity in demanding environments.
Specification Summary & Compliance
This shoulder screw features precise dimensions, including a 1/4"-20 UNC thread with Class 3A fit for tight tolerances, a shoulder diameter of 5/16" with tolerance of -0.004" to -0.002", and a shoulder length of 1/2" with tolerance of -0.005" to 0.005". It complies with ASME B18.3 manufacturing standards and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and quality assurance.
