S-92381A202 4-40 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 316 stainless steel material and passivated finish, ideal for harsh industrial environments.
- Precise component alignment due to the smooth, ultra-low socket head and exact shoulder diameter tolerances (-0.001" to 0").
- High mechanical strength offering 70,000 psi tensile strength and Rockwell B79 hardness for reliable, long-term performance.
- Easy installation and secure fit with Class 2A UNC coarse threads and right-hand thread direction, ensuring quick assembly.
- Durable shoulder design with precise fit and controlled shoulder length tolerance (0" to 0.002") for stable rotational movement.
- Compliance with environmental regulations, including RoHS 3 and REACH, for safe use in global markets.
- Versatile drive options with combined socket and slotted drive styles, accommodating various tool types.
Professional Applications & Engineering Value
This 4-40 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision machinery, automation systems, and medical devices. Made from 316 stainless steel with a passivated finish, it resists corrosive chemicals and moisture, extending service life in demanding conditions. The ultra-low socket head and precise shoulder fit minimize play, ensuring accurate component positioning and reducing wear in high-speed applications. With a coarse thread and Class 2A fit, it facilitates quick assembly while maintaining tight tolerances, making it ideal for industrial fasteners in robotics, aerospace, and electronics where reliability is paramount.
Specification Summary & Compliance
The screw adheres to UNC thread standards with a Class 2A thread fit for consistent engagement. Shoulder dimensions include a diameter of 1/8" (tolerance: -0.001" to 0") and length of 1/4" (tolerance: 0" to 0.002"), ensuring precision grade performance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmentally responsible manufacturing and use in global industries.
