S-91273A566 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
- Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
- Enhanced durability and wear resistance from the black oxide finish, providing long-lasting performance
- High tensile strength of 70,000 psi and shear strength of 35,000 psi for reliable load-bearing in demanding applications
- Precise Class 2A thread fit ensures smooth assembly and secure fastening with minimal play
- Knurled socket head with hex drive offers excellent grip and torque transmission, reducing tool slippage
- Accurate 3/4" shoulder length with tight tolerances for consistent alignment and spacing in assemblies
- Compliance with RoHS 3 and REACH regulations ensures environmental safety and broad industrial usability
Professional Applications & Engineering Value
This 1/4"-20 UNC shoulder screw is engineered to address critical challenges in industrial applications such as machinery, automotive, and precision equipment. The 18-8 stainless steel material provides excellent resistance to rust and corrosion, extending service life in humid or chemically aggressive settings. The black oxide finish not only enhances aesthetics but also reduces friction and wear, making it suitable for high-cycle operations. With its coarse UNC thread and Class 2A fit, it ensures quick, reliable installation and vibration resistance, while the 3/4" shoulder length maintains precise component alignment, reducing misalignment issues and downtime in assembly lines.
Specification Summary & Compliance
This shoulder screw features a 1/4"-20 UNC thread with Class 2A fit for standard tolerance, ensuring compatibility with common nuts and threaded holes. The shoulder diameter is 1/4" with a tolerance of -0.004" to -0.002", and the shoulder length is 3/4" with a tolerance of -0.005" to 0.005" for precise engineering applications. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.
