S-96640A263 4-40 x 3/8" 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 18-8 stainless steel construction and black-oxide coating, ideal for harsh environments.
- Superior tensile strength rated at 80,000 psi ensures reliable, long-lasting fastening under high-stress conditions.
- Precision Class 2A thread fit and coarse UNC threading enable quick, secure installation and vibration resistance.
- Undercut flat head design with an 82° countersink angle allows for a flush, professional finish in countersunk holes.
- Full threading provides maximum grip and holding power along the entire 3/8" length.
- Consistent hardness (Rockwell B80) maintains structural integrity and prevents stripping during installation.
- Broad compliance with ASME B18.6.3, RoHS 3, and REACH ensures safety and regulatory adherence for global projects.
Professional Applications & Engineering Value
These 4-40 UNC flat head Phillips screws are engineered to address common industrial challenges such as material fatigue and environmental degradation. The black-oxide 18-8 stainless steel offers enhanced corrosion resistance, making them suitable for applications in electronics, machinery, and outdoor equipment where moisture or chemicals are present. The undercut flat head and 82° countersink angle ensure a seamless fit, reducing protrusion and minimizing snag risks in assembled products. With a coarse thread and Class 2A fit, these screws provide quick assembly and reliable performance in vibration-prone settings, streamlining production while upholding durability standards.
Specification Summary & Compliance
This product features precise Class 2A thread fit and adheres to UNC coarse thread standards with a 4-40 size. Manufactured in accordance with ASME B18.6.3, it ensures dimensional accuracy and performance reliability. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, these screws meet environmental and safety requirements for industrial use.
