S-90337A329 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 and passivated finish, ideal for harsh industrial environments
- Precise component alignment ensured by the precisely machined shoulder with tight diameter and length tolerances
- High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
- Space-saving low-profile design with socket head allowing for flush mounting in confined spaces
- Reliable thread engagement provided by Class 2A UNC coarse threads for secure fastening
- Easy installation and removal using standard 0.156" hex drive tools
- Environmental compliance meeting RoHS 3 and REACH regulations for global manufacturing requirements
Professional Applications & Engineering Value
This 1/4"-20 UNC shoulder screw is engineered to solve critical alignment and space constraints in precision machinery. The 18-8 stainless steel construction with passivated finish provides excellent corrosion resistance, making it suitable for medical devices, automation equipment, and electronic enclosures exposed to moisture. The low-profile socket head minimizes protrusion while the precisely machined shoulder with ±0.002" length tolerance ensures accurate component positioning and rotational stability. With 70,000 psi tensile strength and Class 2A thread fit, this fastener maintains structural integrity under vibration and load, reducing maintenance needs in continuous operation environments.
Specification Summary & Compliance
This precision shoulder screw features Class 2A thread fit with UNC coarse threading (1/4"-20) and maintains tight shoulder diameter tolerance (-0.001" to 0") and length tolerance (0" to 0.002"). Manufactured from 18-8 stainless steel with passivated surface treatment, the fastener complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial applications requiring strict material compliance standards.
