S-93802A315 2-56 x 1/8" MIL-DTL-18240 Sealing Thread-Locking Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Reliable Sealing Under High Pressure: Integrated silicone O-ring ensures leak-proof performance up to 6000 psi, ideal for hydraulic and pneumatic systems.
• Vibration-Resistant Locking: Nylon patch thread locker prevents loosening from -40° to 225°F, maintaining secure fastening in dynamic environments.
• Exceptional Corrosion Resistance: 18-8 stainless steel with passivated finish provides long-lasting durability in harsh, moisture-rich conditions.
• High Tensile Strength for Demanding Applications: 70,000 psi tensile strength ensures structural integrity under heavy loads and stress.
• Broad Temperature Compatibility: Operates reliably from -80° to 400°F, suitable for extreme thermal cycles without performance loss.
• Easy Installation with Standard Drive: Phillips No. 1 drive and rounded pan head design allow for quick, tool-friendly assembly.
• Precision Thread Fit for Secure Engagement: Class 2A UNC coarse threads ensure consistent, reliable mating with standard nuts and tapped holes.

Professional Applications & Engineering Value

This 2-56 UNC rounded head screw combines 18-8 stainless steel construction with dual-function sealing and locking technology to address critical industrial challenges. The silicone O-ring creates a robust seal against fluids and gases in high-pressure systems up to 6000 psi, preventing leaks in applications like pumps, valves, and compressors. Simultaneously, the nylon patch thread locker resists vibration-induced loosening, ensuring fastener integrity in machinery and equipment subject to constant motion. The passivated finish enhances corrosion resistance, making these screws ideal for marine, chemical processing, and outdoor environments. With a coarse thread design and Phillips drive, installation is streamlined, reducing assembly time while maintaining compliance with MIL-DTL-18240 specifications for reliability in aerospace, defense, and industrial sealing applications.

Specification Summary & Compliance

This screw features 2-56 UNC coarse threads with Class 2A fit for precise, reliable engagement. It is manufactured from 18-8 stainless steel with a passivated finish and includes a silicone O-ring and nylon patch thread locker. The product meets MIL-DTL-18240 specifications and is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial and defense applications.