S-96640A050 4-40 x 1/8" ASME B18.6.3 Stainless Steel Phillips Flat Head Screws
Stainless Steel Phillips Flat Head 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
- Exceptional corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments
- Superior tensile strength of 80,000 psi ensures reliable, long-lasting fastening under high-stress conditions
- Precision Class 2A thread fit guarantees smooth installation and consistent performance in mating components
- Fully threaded design provides maximum grip and holding power across the entire screw length
- 82° countersink angle with undercut flat head delivers a flush, professional finish that minimizes protrusion
- Compliance with ASME B18.6.3, RoHS 3, and REACH ensures adherence to strict quality and environmental standards
- Rockwell B80 hardness offers excellent durability and resistance to wear during repeated use
Professional Applications & Engineering Value
These 4-40 UNC flat head screws are engineered to address critical fastening challenges in precision assemblies where space is limited and corrosion resistance is paramount. The Black-Oxide 18-8 Stainless Steel material provides a robust barrier against moisture and chemicals, extending service life in demanding applications like electronics enclosures, machinery, and automotive components. The fully threaded coarse thread design ensures rapid installation and superior pull-out resistance, while the Phillips No. 1 drive allows for efficient torque application without slippage. The undercut flat head with an 82° countersink angle enables a seamless fit, reducing the risk of snagging and improving aesthetic integration in finished products. Ideal for industries requiring reliable, corrosion-resistant fastening solutions that meet rigorous engineering and regulatory standards.
Specification Summary & Compliance
This screw features a 4-40 UNC coarse thread with Class 2A thread fit for precise dimensional accuracy and easy assembly. Manufactured in accordance with ASME B18.6.3 specifications, it ensures consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its adherence to environmental and safety standards for industrial use.
