S-90550A640 10-32 x 3/4" 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 for long-lasting performance in harsh industrial environments.
• High-strength, precision threading with Class 3A UNF fine thread fit ensures reliable, vibration-resistant fastening in critical assemblies.
• Efficient installation and removal via the 1/8" hex drive, providing superior torque transmission and reduced tool slippage.
• Optimal flush mounting with the standard flat head and 82° countersink angle for a smooth, secure finish in countersunk holes.
• Enhanced pressure equalization through the vented screw feature (0.046" vent diameter), preventing pressure buildup in sealed applications.
• Full-length threading offers maximum grip and adjustment flexibility along the entire 3/4" length for versatile mounting needs.
• Regulatory peace of mind with compliance to RoHS 3 and REACH, ensuring environmental safety and material restrictions are met.

Professional Applications & Engineering Value

This 10-32 UNF flat head screw is engineered to address common industrial challenges like corrosion, vibration loosening, and pressure differentials. The 18-8 stainless steel material provides excellent resistance to rust and oxidation, making it ideal for applications in marine, chemical processing, and outdoor equipment. The Class 3A thread fit and UNF fine threading deliver superior holding power and precision in assemblies requiring high vibration resistance, such as machinery, aerospace components, and electronic enclosures. The vented design is critical for pressure-sensitive environments, allowing air or fluid equalization without compromising structural integrity. Combined with the hex drive for secure tool engagement, this screw ensures reliable performance in demanding industrial applications where durability and compliance are paramount.

Specification Summary & Compliance

This screw adheres to strict dimensional and performance standards, including Class 3A thread fit for precise tolerance and UNF thread type with fine spacing. It meets ASME B18.3, ASTM F879, and MIL-DTL-18240 specifications, ensuring consistency and reliability in manufacturing. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in regulated industries.