S-90277A112 4-40 x 5/8" ASME B18.6.3 Steel Binding Head Slotted Screws
Steel Binding 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 for extended service life in harsh industrial environments.
- High tensile strength of 60,000 psi ensures reliable, secure fastening under significant mechanical stress.
- Excellent thread engagement provided by coarse UNC threads and Class 2A fit for quick assembly and vibration resistance.
- Easy installation and removal with a wide, rounded binding head and slotted drive for straightforward tool access.
- Full threading along the 5/8" length offers maximum grip and adjustability in various material thicknesses.
- Compliance with major standards including ASME B18.6.3, RoHS 3, and REACH for guaranteed quality and environmental safety.
- Durable Rockwell B69 hardness maintains thread integrity and head shape during repeated use.
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws are engineered to address common industrial fastening challenges, such as corrosion and mechanical failure. The zinc plating provides a protective barrier against rust, making them ideal for electrical assemblies, machinery panels, and binding posts where moisture or chemical exposure is a concern. The coarse thread design ensures rapid installation and strong holding power in softer materials, while the slotted binding head offers broad bearing surface to prevent pull-through. Fully threaded for consistent clamping force, these ASME B18.6.3 compliant screws deliver reliable performance in high-vibration applications, reducing maintenance needs and downtime.
Specification Summary & Compliance
This product features a Class 2A thread fit per UNC standards, ensuring dimensional accuracy and interchangeability. It meets ASME B18.6.3 for mechanical and dimensional requirements, and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted hazardous substances. Manufactured with a tensile strength of 60,000 psi and Rockwell B69 hardness, these screws are fully threaded and right-hand threaded for standard industrial use.
