S-95488A123 4-40 x 5/16" Thumb Screws
Thumb Screws
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Basic Information
Head Parameters
Dimensions
Thread Parameters
Material & Strength
Temperature & Environment
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Key Features & Benefits at a Glance
- Enhanced Grip and Easy Manual Operation: Knurled thumb head design provides superior tactile control without tools, speeding up assembly and adjustments.
- Excellent Corrosion Resistance: Made from durable brass, offering reliable performance in various environments and reducing maintenance needs.
- High Mechanical Strength: With a 50,000 psi tensile strength and Rockwell B78 hardness, it withstands significant stress and repeated use.
- Precise and Reliable Threading: Fully threaded with a Class 2A fit and 4-40 UNC coarse thread ensures secure, vibration-resistant fastening.
- Low-Profile, Space-Efficient Design: Round head with low profile minimizes protrusion, ideal for compact assemblies.
- Right-Hand Thread for Standard Use: Compatible with common installation practices, facilitating quick and intuitive tightening.
- Environmental and Regulatory Compliance: RoHS 3 compliant (with exemption 6c), meeting strict industry standards for safe usage.
Professional Applications & Engineering Value
This 4-40 UNC brass thumb screw is engineered to address common industrial challenges such as frequent adjustments and tool-free access in tight spaces. The knurled head offers a non-slip surface, enabling quick manual tightening in electronics, machinery, and instrumentation panels where precision and ease of use are critical. Its brass construction resists corrosion, extending service life in humid or corrosive environments, while the coarse thread and Class 2A fit provide reliable engagement without cross-threading. Ideal for industrial thumb screws applications, it combines durability with regulatory adherence, supporting efficient maintenance and reducing downtime in B2B settings.
Specification Summary & Compliance
This thumb screw adheres to UNC thread standards with a Class 2A thread fit for precise dimensional accuracy. It is fully threaded with a right-hand direction and meets RoHS 3 (2015/863/EU) compliance under exemption 6(c) for lead in copper alloys, ensuring it aligns with environmental and safety regulations for industrial use.
