S-90272A321 4-40 x 11/16" 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-strength performance with 60,000 psi tensile strength and Rockwell B70 hardness for reliable load-bearing applications
- Easy installation and removal with Phillips No. 1 drive and rounded pan head design
- Precise thread engagement with Class 2A UNC coarse threads ensuring secure fastening in various materials
- Full thread coverage along the 11/16" length for maximum grip and distribution of clamping force
- Industry-standard compliance with ASME B18.6.3 specifications for consistent quality and interchangeability
- Environmental regulation adherence meeting RoHS 3 and REACH requirements for safe industrial use
Professional Applications & Engineering Value
These 4-40 UNC zinc-plated steel rounded head screws deliver exceptional engineering value in industrial assembly where vibration resistance and corrosion protection are critical. The zinc-plated steel material provides a durable barrier against oxidation, while the coarse UNC threads and Class 2A thread fit ensure reliable fastening in metals, plastics, and composite materials. The fully threaded design maximizes surface contact for superior holding power in heavy-duty applications such as machinery enclosures, electrical panels, and automotive components. With 60,000 psi tensile strength and Rockwell B70 hardness, these Phillips drive screws withstand significant mechanical stress without stripping or failure, reducing maintenance downtime and replacement costs.
Specification Summary & Compliance
This screw features precise Class 2A thread fit per UNC standards with 4-40 thread size and 11/16" length in the inch measurement system. Manufacturing complies with ASME B18.6.3 specifications for dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in industrial and commercial applications.
