S-90298A141 4-40 ASME B18.3 Shoulder Screws
Shoulder Screws
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Material & Strength
Temperature & Environment
- Fast delivery
- Enjoy discounts on bulk purchases
- Secure Payment
- Fast Global Shipping
Key Features & Benefits at a Glance
- Superior corrosion resistance with 18-8 stainless steel and passivated finish, ideal for harsh industrial environments
- Precise alignment and smooth rotation thanks to the machined shoulder with tight diameter tolerance of ±0.001"
- High-strength, reliable fastening ensured by Class 3A thread fit for secure assemblies in demanding applications
- Easy installation and removal with standard hex socket drive (5/64") for efficient maintenance and assembly
- Consistent performance and interchangeability guaranteed by compliance with ASME B18.3 standards
- Environmental and safety compliance with RoHS 3 and REACH regulations, suitable for global markets
- Durable, coarse UNC threads provide excellent grip and resistance to vibration loosening
Professional Applications & Engineering Value
This 4-40 UNC thread shoulder screw is engineered to address critical alignment and durability challenges in precision assemblies. The 18-8 stainless steel construction, combined with a passivated finish, offers exceptional resistance to corrosion and wear, making it ideal for machinery, electronics, and automotive components where exposure to moisture or chemicals is a concern. The socket head design with hex drive allows for easy torque application in confined spaces, while the precisely machined shoulder ensures accurate component positioning and reduces wear on mating parts. By meeting ASME B18.3 specifications, this shoulder screw delivers reliable performance in applications requiring repeated disassembly and high mechanical stress, minimizing downtime and maintenance costs.
Specification Summary & Compliance
This shoulder screw features a 4-40 UNC coarse thread with Class 3A thread fit for high precision, and a shoulder diameter tolerance of -0.001" to 0.001" for exact alignment. It complies with ASME B18.3 manufacturing standards and is RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliant, ensuring environmental safety and regulatory adherence.
