S-90292A128 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 corrosion resistance and strength from 17-4 PH stainless steel, ideal for harsh industrial environments.
- High load-bearing capacity with 130,000 psi tensile strength and 65,000 psi shear strength for reliable performance under stress.
- Precise alignment and reduced wear thanks to the 1" shoulder length with tight tolerances, ensuring stable component positioning.
- Secure, slip-resistant installation with a knurled socket head and 5/32" hex drive for easy torque application.
- Superior thread reliability with Class 3A UNC coarse threads, providing consistent fit and vibration resistance.
- Durable, long-lasting performance backed by Rockwell C28 hardness, maintaining integrity in demanding applications.
- Compliance with industry standards including ASME B18.3, RoHS 3, and REACH, ensuring safety and regulatory adherence.
Professional Applications & Engineering Value
This 1/4-20 UNC shoulder screw is engineered to address common industrial challenges such as misalignment, vibration loosening, and material fatigue. Made from 17-4 PH stainless steel, it offers excellent corrosion resistance and high strength, making it suitable for precision machinery, automotive assemblies, and heavy-duty equipment. The Class 3A thread fit and coarse UNC thread ensure secure fastening in high-stress environments, while the knurled socket head enhances grip during installation. The 1" shoulder provides accurate alignment for rotating parts, reducing wear and extending service life. Ideal for applications requiring reliable tensile and shear strength, this screw delivers consistent performance in demanding engineering scenarios.
Specification Summary & Compliance
This shoulder screw features precise dimensions, including a shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005", ensuring high accuracy. It adheres to Class 3A thread fit standards for reliable engagement and meets ASME B18.3 specifications. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it is free from hazardous substances, supporting safe and sustainable industrial use.
