S-94361A378 1/2"-20 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 Tensile Strength: Withstands up to 140,000 psi for reliable performance in high-stress applications, reducing the risk of fastener failure.
- Precision Class 3A Thread Fit: Ensures tight, secure mating with components, minimizing backlash and improving assembly accuracy.
- Durable Black Oxide Finish: Provides corrosion resistance and a sleek appearance, extending service life in harsh industrial environments.
- Knurled Socket Head Design: Enhances grip during installation with a standard hex drive, allowing for easy torque application and reduced slippage.
- Fine UNF Thread Profile: Offers superior holding power and vibration resistance compared to coarse threads, ideal for precision machinery.
- Robust Alloy Steel Construction: Delivers Rockwell C32 hardness for excellent wear resistance, ensuring long-term durability under heavy loads.
- Accurate Shoulder Dimensions: Features tight tolerances on diameter and length for consistent alignment in pivoting or rotating assemblies.
Professional Applications & Engineering Value
This shoulder screw is engineered to address common industrial challenges, such as misalignment and wear in dynamic applications. The alloy steel material, combined with a black oxide finish, resists corrosion and abrasion, making it suitable for machinery, automotive, and aerospace components where reliability is critical. The 1/2"-20 UNF fine thread and Class 3A fit ensure precise engagement, reducing the need for frequent adjustments and maintenance. Its knurled socket head with a hex drive simplifies installation in confined spaces, while the shoulder provides stable support for bearings or linkages, enhancing overall system efficiency and reducing downtime in industrial fastening solutions.
Specification Summary & Compliance
This shoulder screw adheres to UNF thread standards with a Class 3A thread fit for high precision. Dimensions include a shoulder diameter of 5/8" with tolerances from -0.004" to -0.002", and a shoulder length of 1 3/4" with tolerances of -0.005" to 0.005". It is manufactured to meet RoHS 3 (2015/863/EU) compliance under exemption 6(a) for lead in steel and is REACH (EC 1907/2006) compliant, ensuring environmental and safety standards are upheld for industrial use.
