S-94328A944 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 strength and durability with 140,000 psi tensile strength and Rockwell C30 hardness for reliable performance in high-stress applications.
- Precise alignment and secure fit thanks to Class 3A thread fit and standard shoulder fit, ensuring minimal play and vibration resistance.
- Enhanced corrosion resistance from the black oxide finish, extending service life in harsh industrial environments.
- Easy installation and removal with a 5/32" hex drive and knurled, low-profile socket head for improved grip and torque application.
- Wide compatibility with 1/4"-20 UNC coarse right-hand threads, making it suitable for standard industrial assemblies.
- Regulatory compliance assurance by meeting RoHS 3 and REACH standards, ensuring safe and eco-friendly use.
- Optimized shoulder design with 7/16" shoulder length and 5/16" diameter for stable bearing surfaces and accurate component positioning.
Professional Applications & Engineering Value
This alloy steel shoulder screw is engineered to address critical challenges in precision machinery, such as misalignment and component wear. The black oxide finish provides a protective layer against rust and corrosion, ideal for environments exposed to moisture or chemicals. With a Class 3A thread fit and coarse UNC threads, it ensures tight tolerances and quick assembly in automated systems, reducing downtime. The knurled socket head and hex drive allow for secure tool engagement, preventing slippage during high-torque applications. Commonly used in pivots, gears, and linkages, this screw delivers reliable alignment and load distribution, enhancing the longevity and efficiency of industrial equipment.
Specification Summary & Compliance
This shoulder screw adheres to precise dimensional standards, including a Class 3A thread fit for tight tolerances and UNC coarse threading. The shoulder diameter is 5/16" with a tolerance of -0.004" to -0.002", and the shoulder length is 5/8" with a tolerance of -0.005" to 0.005". It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for industrial applications.
