S-91829A305 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 corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments.
- Superior strength and durability from 70,000 psi tensile strength and Rockwell B55 hardness, ensuring reliable performance under load.
- Precise alignment and reduced wear due to the smooth, precisely machined shoulder with tight diameter and length tolerances.
- Easy installation and removal with a standard socket head and slotted drive, compatible with common tools.
- Secure and consistent fastening provided by the Class 2A thread fit and coarse UNC thread, minimizing loosening.
- Compliance with global regulations including RoHS 3 and REACH, ensuring safety and environmental standards are met.
- Versatile right-hand thread design suitable for a wide range of machinery and assembly applications.
Professional Applications & Engineering Value
This 1/4"-20 UNC shoulder screw is engineered to address critical alignment and rotational stability challenges in precision industrial applications. The 18-8 stainless steel construction, combined with a passivated finish, offers excellent resistance to corrosion and oxidation, extending service life in demanding conditions such as assembly jigs, rotating shafts, and machinery linkages. The precise shoulder (5/16" diameter, 5/8" length) ensures accurate component positioning, reducing vibration and wear on mating parts. With a Class 2A thread fit and coarse UNC threads, it provides reliable fastening that withstands high-stress environments, making it a trusted choice for engineers seeking durability and compliance in heavy-duty industrial settings.
Specification Summary & Compliance
This shoulder screw adheres to Class 2A thread fit and UNC thread standards for consistent performance. Shoulder dimensions are manufactured to precise tolerances (diameter: -0.001" to 0", length: 0" to 0.002") to ensure accurate assembly. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and environmentally responsible use in global markets.
