S-90550A440 8-32 x 3/4" 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 for long-lasting performance in harsh environments
- Precise Class 3A thread fit ensures tight, secure fastening and reduces the risk of cross-threading during installation
- Vented design allows for pressure equalization and prevents fluid or gas entrapment in critical assemblies
- 82° countersink angle provides a flush, low-profile finish that enhances safety and aesthetics
- Hex drive (3/32") offers high torque transmission and reduces the risk of tool slippage or head stripping
- Fully threaded shank maximizes grip length and load distribution across the entire fastener
- Compliance with major industrial standards including ASME B18.3, MIL-DTL-18240, and ASTM F879 guarantees reliability and interchangeability
Professional Applications & Engineering Value
This 8-32 UNC flat head vented screw is engineered to address critical challenges in industrial assembly, particularly in applications requiring pressure management and corrosion resistance. The 18-8 stainless steel material provides excellent durability against oxidation and chemical exposure, making it ideal for marine, chemical processing, and outdoor equipment. The vented feature is crucial in sealed systems, preventing vacuum lock or pressure buildup that could compromise assembly integrity. With its Class 3A thread fit and coarse UNC thread, this fastener ensures rapid installation and high vibration resistance, reducing maintenance needs in machinery, electronics enclosures, and automotive components. The flat head with 82° countersink allows for smooth, flush mounting, eliminating protrusions in sensitive applications.
Specification Summary & Compliance
This screw features a 3/4" length with UNC coarse threads and Class 3A thread fit for precision assembly. It conforms to ASME B18.3, ASTM F879, and MIL-DTL-18240 specifications, ensuring consistent quality and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for use in regulated industries worldwide.
