S-90272A287 4-40 x 3" ASME B18.6.3 Steel Pan Head Phillips Screws
Steel Pan Head Phillips 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, extending service life in demanding environments.
- High tensile strength of 60,000 psi ensures reliable fastening under significant mechanical stress and vibration.
- Rockwell B70 hardness provides excellent durability and resistance to wear and deformation.
- Coarse UNC threads with Class 2A fit offer quick assembly and secure holding power in a wide range of materials.
- Fully threaded design maximizes grip length and pull-out strength along the entire 3" shank.
- Pan-style rounded head with Phillips No. 1 drive allows for flush installation and easy, cam-out resistant driving.
- Compliance with ASME B18.6.3, RoHS 3, and REACH guarantees consistent quality, safety, and environmental responsibility.
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws are engineered to address common industrial challenges such as corrosion, vibration loosening, and assembly efficiency. The zinc plating provides a protective barrier against rust and chemical exposure, making them ideal for outdoor equipment, electrical enclosures, and machinery in humid conditions. The coarse thread and Class 2A thread fit ensure rapid installation and reliable performance in softer materials or where repeated disassembly is required. With a fully threaded 3" length and Phillips drive, they offer uniform clamping force and ease of use with standard tools, reducing assembly time and improving productivity in manufacturing, maintenance, and OEM applications.
Specification Summary & Compliance
This product features precise UNC coarse threads with Class 2A fit, ensuring dimensional accuracy and interchangeability. It is manufactured in compliance with ASME B18.6.3 standards for consistent performance and safety. Additionally, it meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulatory requirements, confirming the absence of hazardous substances and supporting environmentally responsible procurement.
