S-90357A115 4-40 x 1/4" Alloy Steel Ultra-Low-Profile Socket Head Screws
Alloy Steel Ultra-Low-Profile Socket Head 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
- Exceptional strength and durability with 140,000 psi tensile strength and Rockwell C32 hardness for reliable performance in high-stress environments.
- Precise and secure fastening ensured by Class 3A thread fit, minimizing the risk of loosening and improving assembly reliability.
- Space-saving ultra-low profile head allows installation in tight or restricted spaces where standard heads won't fit.
- Corrosion-resistant black-oxide finish on alloy steel provides enhanced protection against rust in various industrial conditions.
- Easy installation and removal with a 1/16" hex drive, offering a secure grip and reducing tool slippage during use.
- Wide compatibility with 4-40 UNC coarse threads, making it suitable for general-purpose applications in machinery and equipment.
- Compliance with environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries.
Professional Applications & Engineering Value
This 4-40 UNC thread socket head cap screw is engineered to address common industrial challenges such as vibration-induced loosening and space constraints. The Black-Oxide Alloy Steel construction, combined with a Class 3A thread fit, delivers superior clamping force and resistance to wear, making it ideal for precision assemblies in automotive, aerospace, and machinery sectors. The ultra-low profile head and fully threaded design enable consistent engagement in deep or narrow cavities, reducing the need for custom fasteners. With a coarse thread and right-hand direction, it ensures quick installation and high reliability in dynamic environments, while the hex drive simplifies maintenance and disassembly.
Specification Summary & Compliance
This screw adheres to UNC thread standards with a Class 3A thread fit for precise dimensional accuracy, including a length tolerance of -0.005" to 0.005". It meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) compliance, ensuring it is free from hazardous substances and suitable for global industrial applications. Manufactured from alloy steel with a black-oxide surface treatment, it maintains consistent performance under demanding conditions.
