S-8077A742 1/2"-13 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 chemical exposure.
- Exceptional mechanical strength offering 70,000 psi tensile and 35,000 psi shear strength for demanding, high-load applications.
- Precise alignment and smooth rotation ensured by the 4" shoulder with tight diameter and length tolerances.
- Reliable, vibration-resistant fastening with a Class 3A thread fit and coarse 1/2"-13 UNC thread for secure assembly.
- Enhanced grip and easy installation from the knurled socket head with a standard 5/16" hex drive.
- Durable, wear-resistant surface provided by the black oxide finish, reducing galling and extending service life.
- Guaranteed quality and safety compliance meeting ASME B18.3 standards and environmental regulations like RoHS 3 and REACH.
Professional Applications & Engineering Value
This shoulder screw is engineered to solve critical alignment and pivot point challenges in industrial machinery. The 4" shoulder length and precise shoulder diameter tolerance provide a stable bearing surface, preventing misalignment in assemblies like linkages, gears, and rotating components. Made from 316 stainless steel with a black oxide finish, it resists corrosion from moisture, chemicals, and saltwater environments, reducing maintenance downtime. The coarse UNC thread and Class 3A fit ensure quick, secure fastening even under vibration, making it ideal for heavy-duty applications in automotive, marine, and food processing equipment where reliability is paramount.
Specification Summary & Compliance
This shoulder screw features a 1/2"-13 UNC thread with Class 3A thread fit for high precision. The shoulder has a diameter of 5/8" with a tolerance of -0.004" to -0.002" and a length of 4" with a tolerance of -0.005" to 0.005". It is manufactured in compliance with ASME B18.3 specifications and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring it meets stringent industry and environmental standards.
