S-90807A112 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
- Enhanced Durability & Corrosion Resistance – Black oxide finish provides reliable protection against rust and wear in demanding industrial environments.
- Superior Tensile Strength – 140,000 psi tensile strength ensures high load-bearing capacity and reliable performance under stress.
- Precision Thread Fit – Class 3A thread tolerance guarantees secure, vibration-resistant fastening with minimal backlash.
- Easy Installation & Grip – Knurled socket head with hex drive allows for quick, tool-friendly assembly and reduced slippage.
- Robust Material Construction – Alloy steel with Rockwell C32 hardness offers excellent mechanical strength and long-term reliability.
- Wide Compatibility – 1/4"-20 UNC coarse threads are ideal for standard industrial applications requiring coarse threading.
- Environmental Compliance – Meets RoHS 3 and REACH standards, ensuring safe use in regulated industries.
Professional Applications & Engineering Value
This alloy steel shoulder screw is engineered to address critical alignment and positioning challenges in mechanical assemblies. The Class 3A thread fit and precise shoulder dimensions provide stable, repeatable locating in machinery, jigs, and rotating equipment, reducing misalignment and wear. The black oxide finish enhances corrosion resistance, extending service life in humid or abrasive conditions. With a 140,000 psi tensile strength and Rockwell C32 hardness, it withstands high-stress applications such as automotive fixtures, conveyor systems, and precision instruments. The knurled socket head with hex drive ensures easy installation and removal, improving maintenance efficiency. Ideal for industrial shoulder positioning and UNC coarse thread applications, this screw delivers consistent performance where reliability is paramount.
Specification Summary & Compliance
This shoulder screw features a 1/4"-20 UNC coarse thread with Class 3A fit for high precision, and shoulder diameter tolerance of -0.004" to -0.002" and length tolerance of -0.005" to 0.005" ensuring accurate alignment. Manufactured from alloy steel with black oxide finish, it complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible sourcing and usage in global markets.
