S-90550A510 10-24 x 3/8" ASME B18.3, ASTM F879, MIL-DTL-18240 Venting Stainless Steel Hex-Drive Flat Head Screws

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Precise Class 3A thread fit ensures tight, secure fastening with minimal risk of loosening in high-vibration applications.
• Efficient hex drive (1/8") allows for high-torque installation with standard tools, speeding up assembly processes.
• Vented design (0.046" diameter) prevents pressure buildup and allows for fluid/air passage, enhancing functionality in specialized assemblies.
• 82° countersink angle and flat head profile provide a flush, low-profile finish for a clean and safe surface.
• Fully threaded coarse (UNC) design offers maximum grip and holding power across the entire 3/8" length.
• Compliance with major industrial standards including ASME B18.3, ASTM F879, and MIL-DTL-18240, ensuring consistent quality and performance.

Professional Applications & Engineering Value

This 10-24 UNC flat head screw is engineered to address critical challenges in industrial and mechanical assemblies. Constructed from 18-8 Stainless Steel, it provides excellent corrosion resistance, making it suitable for use in moist, chemical, or outdoor environments without compromising integrity. The fully threaded coarse UNC thread with a precise Class 3A fit ensures reliable engagement and vibration resistance, reducing maintenance needs in machinery, electronics, and automotive systems. The vented feature allows for pressure equalization and fluid drainage, preventing seal failure in enclosed systems. Combined with an 82° countersink angle and hex drive, it facilitates quick, secure installations in tight spaces, enhancing assembly efficiency and structural stability for OEMs and MRO professionals.

Specification Summary & Compliance

This screw adheres to strict dimensional and performance standards, including Class 3A thread fit for high precision, UNC coarse thread spacing, and a right-hand thread direction. It meets ASME B18.3, ASTM F879, and MIL-DTL-18240 specifications, ensuring reliability in demanding applications. Additionally, it is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, supporting environmental and safety regulations for global industrial use.