S-90276A105 4-40 x 3/16" ASME B18.6.3 Steel Round Head Slotted Screws
Steel Round Head Slotted 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 zinc-plated steel construction, ideal for humid or demanding industrial environments
- High tensile strength of 60,000 PSI ensures reliable performance under mechanical stress and vibration
- Rockwell B69 hardness provides excellent durability and resistance to wear over extended use
- Class 2A thread fit with UNC coarse threading allows for quick, easy assembly and secure fastening
- Fully threaded design offers maximum grip and uniform load distribution along the entire length
- Slotted drive with rounded head enables straightforward installation using standard tools, reducing assembly time
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures safety, quality, and environmental responsibility
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head slotted screws are engineered to address common industrial challenges such as corrosion, mechanical fatigue, and assembly efficiency. The zinc plating provides a protective barrier against rust and oxidation, extending service life in applications like machinery, electronics, and outdoor equipment. The coarse UNC threads and Class 2A fit ensure quick, reliable fastening with minimal cross-threading risk, while the fully threaded design maximizes holding power in thin materials or pre-tapped holes. Ideal for industrial screws and machine screws uses, they offer consistent performance where precision and durability are critical, reducing maintenance and replacement costs.
Specification Summary & Compliance
This screw features a 4-40 UNC coarse thread with Class 2A thread fit for standard dimensional accuracy and ease of assembly. It meets ASME B18.6.3 specifications for slotted head screws, ensuring consistent quality and interoperability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, it is free from hazardous substances, supporting safe and sustainable industrial practices.
