S-90550A110 2-56 x 3/16" 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
- Enhanced torque transmission through hex drive design, preventing cam-out and ensuring secure fastening
- Maximum holding power with fully threaded UNC coarse threads and Class 3A precision fit
- Efficient pressure equalization via vented design, preventing pressure buildup in sensitive assemblies
- Flush mounting capability with standard 82° countersink angle for smooth surface finishes
- Regulatory compliance assurance meeting ASME B18.3, ASTM F879, and MIL-DTL-18240 specifications
- Environmental safety with RoHS 3 and REACH compliance for restricted substance-free applications
Professional Applications & Engineering Value
These 2-56 UNC flat head screws deliver exceptional engineering value in precision assembly applications where corrosion resistance and reliable fastening are critical. The 18-8 stainless steel material provides excellent durability against environmental factors, while the hex drive ensures maximum torque application without stripping. The vented feature addresses pressure differential issues in sealed systems, making these fasteners ideal for aerospace, electronics, and precision instrumentation. With Class 3A thread fit and fully threaded design, they maintain consistent clamping force across the entire engagement length, preventing loosening in high-vibration environments. The 82° countersink angle facilitates flush mounting in critical clearance applications, ensuring both functional and aesthetic requirements are met in professional assemblies.
Specification Summary & Compliance
Manufactured to exacting standards with Class 3A thread fit precision and UNC coarse thread specifications. These flat head screws comply with ASME B18.3, ASTM F879, and MIL-DTL-18240 manufacturing standards. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring they meet current restricted substance requirements for industrial applications worldwide.
