S-94035A311 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 construction and passivated finish, ideal for harsh industrial environments.
- Precise alignment and secure positioning thanks to the 5/8" shoulder length with precise fit tolerance for reliable assembly.
- High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications.
- Easy installation and removal using a standard 5/32" hex drive socket head for efficient maintenance.
- Reliable thread engagement with Class 2A UNC coarse threads ensuring consistent fastening.
- Compliance with environmental standards including RoHS 3 and REACH for safe, sustainable use in global markets.
- Versatile right-hand threading compatible with common UNC 1/4"-20 components for broad application.
Professional Applications & Engineering Value
This 1/4"-20 UNC shoulder screw is engineered to address critical alignment and durability challenges in precision machinery, automation systems, and assembly jigs. The 18-8 stainless steel material, combined with a passivated finish, provides excellent resistance to corrosion and wear, extending service life in moist or chemically aggressive settings. The 5/8" shoulder length with precise tolerances ensures accurate component positioning, reducing vibration and misalignment issues. Its hex drive socket head allows for quick, tool-friendly installation in confined spaces, while the Class 2A thread fit and 70,000 psi tensile strength guarantee secure, high-load performance in industrial applications such as robotics, conveyor systems, and precision instruments.
Specification Summary & Compliance
This shoulder screw adheres to UNC thread standards with a Class 2A thread fit for consistent engagement. The shoulder features a diameter of 3/8" with a tolerance of -0.001" to 0" and a length of 5/8" with a tolerance of 0" to 0.002", ensuring precise fit. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial use without restricted substances.
