S-91772A112 4-40 x 5/8" ASME B18.6.3 Stainless Steel Pan Head Phillips Screws
Stainless 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 passivated 18-8 stainless steel construction, ideal for harsh environments and extended service life
- High tensile strength of 70,000 PSI ensures reliable fastening under significant mechanical stress and vibration
- Rockwell B70 hardness provides excellent durability and resistance to wear and deformation
- Class 2A thread fit with UNC coarse threading allows for easier, faster assembly and reduced cross-threading risks
- Fully threaded 5/8" length offers maximum grip and holding power across the entire fastener
- Phillips drive (No. 1 size) enables efficient installation with standard tools, improving workflow productivity
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to industry standards and environmental regulations for global supply chain compatibility
Professional Applications & Engineering Value
These 4-40 UNC pan head screws are engineered to address critical challenges in industrial assembly, where corrosion resistance and mechanical reliability are paramount. The passivated 18-8 stainless steel material effectively combats oxidation and chemical exposure, making these screws ideal for applications in electronics, machinery, and outdoor equipment. The coarse UNC threading and Class 2A fit facilitate quick, secure installations, reducing assembly time and minimizing the risk of thread damage. With a fully threaded design and high tensile strength, they provide consistent clamping force and vibration resistance, ensuring long-term performance in demanding environments such as automotive components, HVAC systems, and precision instruments.
Specification Summary & Compliance
This screw features a 4-40 UNC thread size with Class 2A thread fit and coarse thread spacing, ensuring precise dimensional accuracy per industry standards. It is manufactured in compliance with ASME B18.6.3 specifications and meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for use in regulated markets and sustainable manufacturing processes.
