S-97832A273 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 18-8 Stainless Steel construction, ideal for harsh industrial environments and washdown applications.
- Enhanced assembly precision and component alignment thanks to the precisely machined 3/8" shoulder with controlled diameter and length tolerances.
- High-strength performance under load with a tensile strength of 70,000 psi and a minimum shear strength of 35,000 psi for demanding applications.
- Secure, non-slip fastening provided by the knurled socket head, allowing for reliable torque application with a hex drive.
- Reliable thread engagement and vibration resistance ensured by the Class 3A fit for the 1/4"-20 UNC coarse thread.
- Broad industry compatibility by conforming to the ASME B18.3 standard for dimensional consistency and interchangeability.
- Safe for regulated industries with compliance to RoHS 3 and REACH environmental directives.
Professional Applications & Engineering Value
This shoulder screw is engineered to act as both an axle and a fastener, solving critical alignment and pivot point challenges in mechanical assemblies. The 18-8 Stainless Steel material provides excellent resistance to rust and corrosion, making it a durable choice for machinery, food processing equipment, and outdoor applications. The 3/8" shoulder diameter with its tight tolerance ensures a precise fit for bearings, pulleys, or linkages, preventing lateral movement and reducing wear. The knurled socket head offers a superior grip for high-torque installation, while the 1/4"-20 UNC coarse thread and Class 3A fit provide strong, vibration-resistant holding power in metals and plastics. This combination of features delivers long-term reliability and reduces maintenance cycles in industrial settings.
Specification Summary & Compliance
This shoulder screw features a 1/4"-20 UNC thread with a Class 3A fit for superior thread engagement. The shoulder is manufactured to a diameter of 3/8" with a tolerance of -0.004" to -0.002" and a length of 1/4" with a tolerance of -0.005" to 0.005". It is manufactured in compliance with the ASME B18.3 standard and is verified to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant.
