S-90342A111 4-40 x 1/4" Alloy Steel Socket Head Screws with Split Lock Washer
Alloy Steel Socket Head Screws with Split Lock Washer
Image may differ from product. See technical specification for details.
Basic Information
Head Parameters
Dimensions
Thread Parameters
Tip & Drive Parameters
Washer & Nut
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 black-oxide coating on alloy steel, extending service life in demanding environments.
- Exceptional tensile strength of 180,000 psi ensures reliable performance under high-stress industrial applications.
- Precise Class 3A thread fit guarantees tight, secure connections with minimal risk of loosening.
- Integrated split lock washer provides vibration-resistant locking to maintain fastener integrity.
- Rockwell C39 hardness offers excellent wear resistance and durability for repeated use.
- Standard hex socket drive allows for easy installation with common tools in confined spaces.
- Full UNC coarse threading enables quick assembly and disassembly in various materials.
Professional Applications & Engineering Value
This 4-40 UNC thread socket head cap screw is engineered to address critical fastening challenges in industrial settings. The black-oxide alloy steel construction provides enhanced corrosion protection, reducing maintenance needs in humid or chemically exposed environments. With a Rockwell C39 hardness and 180,000 psi tensile strength, it withstands heavy loads and vibrational stresses in machinery, automotive assemblies, and precision equipment. The inclusion of a split lock washer ensures secure, vibration-resistant joints, preventing accidental loosening in dynamic applications. Its right-hand coarse thread and fully threaded design facilitate efficient installation and reliable grip, making it ideal for industrial fasteners requiring durability and compliance with stringent standards.
Specification Summary & Compliance
This screw adheres to UNC thread standards with a precise Class 3A thread fit for optimal dimensional accuracy. It features a coarse thread spacing, right-hand thread direction, and fully threaded rod type for consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory adherence in global markets.
