S-8077A756 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 industrial environments and chemical exposure.
- Enhanced durability and wear resistance from the black oxide finish, providing added protection against rust and galling.
- High load-bearing capacity with 70,000 psi tensile strength and 35,000 psi minimum shear strength for demanding applications.
- Precise alignment and smooth rotation ensured by the 5/8" shoulder diameter with tight tolerances, reducing component wear.
- Secure, non-slip installation thanks to the knurled socket head and 5/16" hex drive, allowing for high torque application.
- Reliable thread engagement with Class 3A fit and 1/2"-13 UNC coarse threads, minimizing cross-threading and ensuring consistent performance.
- Compliance with major industry standards including ASME B18.3, RoHS 3, and REACH, guaranteeing safety and regulatory adherence.
Professional Applications & Engineering Value
This 316 stainless steel shoulder screw is engineered to address critical challenges in industrial fastening, such as misalignment, vibration loosening, and corrosion-induced failure. The black oxide finish enhances surface hardness and provides an extra layer of protection in humid or chemically aggressive settings, extending service life. Its 1/2"-13 UNC coarse thread and Class 3A thread fit ensure quick assembly and reliable holding power, while the precisely machined shoulder acts as a pivot or spacer in machinery, conveyor systems, and precision instruments. By combining high tensile strength with corrosion resistance, this screw reduces maintenance downtime and improves operational reliability in sectors like automotive, aerospace, and heavy equipment manufacturing.
Specification Summary & Compliance
This shoulder screw features a 1/2"-13 UNC thread with Class 3A fit for precise tolerance, and a shoulder diameter of 5/8" with tolerances from -0.004" to -0.002". It meets ASME B18.3 specifications for dimensional consistency and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for global industrial use.
