S-90550A780 1/4"-20 x 2" ASME B18.3, ASTM F879, MIL-DTL-18240 Venting Stainless Steel Hex-Drive Flat Head Screws
Venting Stainless Steel Hex-Drive 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
- Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh industrial environments
- Precise Class 3A thread fit ensures reliable, vibration-resistant fastening in demanding applications
- Vented design prevents pressure buildup and allows for easier installation in sealed assemblies
- Hex drive compatibility provides secure tool engagement and reduces stripping during high-torque installation
- 82° countersink angle enables flush mounting for clean, professional finishes in visible applications
- Coarse UNC threading offers rapid installation and superior holding power in various materials
- Comprehensive standards compliance including ASME B18.3, ASTM F879, and MIL-DTL-18240 for guaranteed quality
Professional Applications & Engineering Value
These 1/4"-20 UNC flat head screws deliver exceptional performance in industrial settings where corrosion resistance and reliability are paramount. The 18-8 stainless steel construction withstands exposure to moisture, chemicals, and extreme temperatures, making them ideal for marine equipment, food processing machinery, and outdoor applications. The vented design solves critical pressure equalization issues in sealed systems, while the partial threading provides optimal grip length for secure fastening. Engineered with Class 3A thread fit and coarse UNC threads, these screws ensure consistent performance in high-vibration environments and offer superior pull-out resistance in both metal and composite materials.
Specification Summary & Compliance
This flat head screw features precise Class 3A thread fit with 1/4"-20 UNC coarse threading and 82° countersink angle. Manufactured to meet ASME B18.3, ASTM F879, and MIL-DTL-18240 specifications, ensuring dimensional accuracy and mechanical performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations for safe use across global industrial markets.
