S-90337A459 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
- Exceptional strength and durability with 70,000 psi tensile strength and Rockwell B55 hardness for reliable performance under load
- Precise component alignment thanks to the precisely machined shoulder with minimal diameter and length tolerances
- Space-saving low-profile design with smooth socket head for applications with limited clearance
- Easy installation and removal with standard 5/32" hex drive and right-hand UNC coarse threads
- Consistent thread quality with Class 2A fit ensuring smooth engagement and reduced cross-threading risk
- Compliance with environmental standards including RoHS 3 and REACH for global market acceptance
Professional Applications & Engineering Value
This precision shoulder screw is engineered to solve critical alignment and mounting challenges in industrial assemblies. The 18-8 stainless steel material combined with passivated finish provides excellent corrosion resistance, making it suitable for machinery, automotive components, and electronic enclosures exposed to moisture or chemicals. The low profile socket head design minimizes protrusion while the 5/16" shoulder diameter with precise tolerances ensures accurate positioning of moving parts like gears, bearings, and linkages. With 1/4"-20 UNC coarse threads and Class 2A fit, it offers reliable fastening in high-vibration applications, reducing maintenance needs and improving overall assembly longevity.
Specification Summary & Compliance
This shoulder screw features 1/4"-20 UNC coarse threads with Class 2A thread fit for standard tolerance applications. The shoulder maintains precise dimensions with diameter tolerance of -0.001" to 0" and length tolerance of 0" to 0.002". Manufacturing complies with industry standards for socket head shoulder screws and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in various industrial sectors.
