S-93802A321 2-56 x 1/4" MIL-DTL-18240 Sealing Thread-Locking Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Reliable Sealing Performance: Integrated silicone rubber O-ring provides excellent sealing up to 6000 psi and withstands temperatures from -80° to 400° F, preventing leaks in high-pressure environments.
• Secure Vibration Resistance: Nylon patch thread locker maintains fastener integrity under vibration and thermal cycling from -40° to 225° F, reducing maintenance needs.
• High Tensile Strength: 70,000 psi tensile strength in 18-8 stainless steel ensures durability and load-bearing capability in demanding applications.
• Corrosion-Resistant Construction: Passivated finish on stainless steel enhances resistance to rust and chemical exposure, extending service life.
• Precision Thread Fit: Class 2A coarse UNC threads allow for easy assembly and reliable engagement, minimizing cross-threading risks.
• Broad Compliance: Meets MIL-DTL-18240 specifications and is RoHS 3/REACH compliant, ensuring quality and environmental safety.
• Convenient Drive Design: Phillips No. 1 drive enables efficient installation with standard tools, speeding up assembly processes.

Professional Applications & Engineering Value

This 2-56 UNC rounded head screw is engineered to address critical challenges in industrial sealing and vibration management. The combination of a nylon patch thread locker and silicone rubber O-ring provides dual functionality: the locker secures the screw against loosening in dynamic environments, while the O-ring ensures a tight seal against fluids and gases up to 6000 psi. Made from 18-8 stainless steel with a passivated finish, it resists corrosion in harsh conditions, making it ideal for applications in aerospace, automotive, and high-pressure fluid systems. The coarse thread and Class 2A fit facilitate quick, error-free installation, reducing downtime and enhancing reliability in assembly lines. By integrating sealing and locking features, this screw eliminates the need for additional components, streamlining inventory and cutting costs for B2B buyers.

Specification Summary & Compliance

This screw features a 2-56 UNC coarse thread with Class 2A dimensional accuracy for consistent performance. It is manufactured in compliance with MIL-DTL-18240 standards, ensuring adherence to rigorous industrial requirements. Additionally, it is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting global environmental and safety regulations for hazardous substances. The fully threaded design and precise specifications support reliable use in certified applications.