S-94361A328 1/4"-28 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 durability with alloy steel construction and 140,000 psi tensile strength for reliable performance in demanding industrial environments.
- Superior corrosion resistance provided by the black oxide finish, extending service life and reducing maintenance needs.
- Precise thread engagement with Class 3A fit and 1/4"-28 UNF fine threads, ensuring secure fastening and vibration resistance.
- Easy installation and removal thanks to the 5/32" hex socket drive and knurled head for improved grip during torque application.
- Accurate alignment and spacing enabled by the 13/16" shoulder length with tight tolerances, minimizing part movement in assemblies.
- High hardness rating of Rockwell C32 reduces wear and deformation under load, supporting long-term reliability.
- Compliance with environmental standards including RoHS 3 and REACH, making it suitable for regulated industries and global supply chains.
Professional Applications & Engineering Value
This alloy steel shoulder screw is engineered to address common industrial challenges such as misalignment, component wear, and fastener failure. The black oxide finish offers enhanced corrosion protection, crucial for machinery exposed to moisture or harsh chemicals. With a Class 3A thread fit and UNF fine threads, it provides superior clamping force and vibration resistance in precision equipment like robotics, automotive systems, and conveyor assemblies. The 13/16" shoulder length and 5/16" shoulder diameter ensure accurate pivoting and spacing, reducing stress on connected parts. Ideal for applications requiring high tensile strength and repeatable performance, this screw minimizes downtime and maintenance costs in industrial shoulder bolt setups.
Specification Summary & Compliance
The screw features precise dimensions including a shoulder diameter tolerance of -0.004" to -0.002" and shoulder length tolerance of -0.005" to 0.005", ensuring consistent fit in assemblies. It adheres to UNF thread standards with a Class 3A thread fit for high accuracy. Manufacturing complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industries.
