S-91829A306 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 and passivated finish, ensuring longevity in harsh industrial environments.
- Precise alignment and reduced wear due to the exact 3/4" shoulder length and smooth texture, minimizing component misalignment.
- High tensile strength of 70,000 psi and Rockwell B55 hardness for reliable performance under heavy loads and repeated use.
- Easy installation and secure fastening with Class 2A thread fit and coarse UNC threading, providing consistent engagement.
- Dual drive compatibility featuring both socket and slotted heads for flexible tool access in confined spaces.
- Environmental compliance with RoHS 3 and REACH regulations, making it safe for various global industrial applications.
- Accurate shoulder diameter of 5/16" with tight tolerances, ensuring a precise fit for rotational components.
Professional Applications & Engineering Value
This 1/4"-20 UNC shoulder screw is engineered to address common industrial challenges like component slippage and corrosion-induced failure. Made from 18-8 stainless steel with a passivated finish, it resists rust and chemical exposure, ideal for machinery, automotive assemblies, and electronic devices. The 3/4" shoulder length and precise Class 2A thread fit provide stable pivoting and alignment in rotating mechanisms, reducing wear and maintenance costs. Its coarse thread spacing and right-hand thread direction facilitate quick assembly, while the dual drive options enhance versatility in tight spaces, ensuring efficient performance in demanding industrial applications.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent dimensional accuracy. Key specifications include a shoulder diameter of 5/16" (tolerance: -0.001" to 0") and shoulder length of 3/4" (tolerance: 0" to 0.002"), ensuring precise assembly. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, guaranteeing environmental safety and suitability for global industrial use.
