S-91273A576 1/4"-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
- Corrosion-resistant 18-8 Stainless Steel construction ensures long-term reliability in harsh industrial environments, reducing maintenance costs.
- Precision 3" shoulder length with tight tolerances provides accurate alignment and smooth rotation in assemblies, minimizing wear and vibration.
- Black Oxide finish enhances corrosion protection and reduces light reflection for discreet applications.
- High tensile strength of 70,000 psi and shear strength of 35,000 psi delivers robust performance under heavy loads and stress.
- Class 2A thread fit with UNC coarse threading ensures easy assembly and secure fastening in high-vibration settings.
- Knurled socket head with hex drive offers superior grip and torque application, preventing tool slippage during installation.
- RoHS 3 and REACH compliance guarantees environmental safety and regulatory adherence for global industrial use.
Professional Applications & Engineering Value
This 18-8 Stainless Steel shoulder screw is engineered to address critical alignment and durability challenges in industrial machinery, robotics, and precision equipment. The 3" shoulder length with minimal tolerance variations ensures exact positioning of moving parts, reducing friction and extending component life. The black oxide finish provides an added layer of corrosion resistance, ideal for humid or chemically exposed environments. With a UNC coarse thread and Class 2A fit, it facilitates quick installation and maintains integrity in high-vibration applications like automotive assemblies or conveyor systems. The socket head design with knurling allows for efficient torque transfer, making it a reliable choice for maintenance-heavy sectors where tool accessibility is crucial.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for precise engagement. Dimensions include a shoulder diameter of 1/4" (tolerance: -0.004" to -0.002") and shoulder length of 3" (tolerance: -0.005" to 0.005"), ensuring consistent performance. It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, supporting safe and sustainable industrial operations.
