S-95345A012 2-56 x 3/16" ASME B18.13 Stainless Steel Pan Head Phillips Screws with Internal-Tooth Lock Washer

Key Features & Benefits at a Glance

• Vibration-Resistant Locking: Integrated internal-tooth lock washer made from 410 stainless steel prevents loosening under dynamic loads, ensuring reliable fastening in high-vibration industrial environments.
• Superior Corrosion Resistance: Constructed from 18-8 stainless steel with a passivated finish, offering excellent protection against rust and corrosion in harsh operating conditions.
• High Tensile Strength: With a tensile strength of 70,000 psi, this screw provides robust, durable fastening capable of withstanding significant mechanical stress.
• Secure and Efficient Drive: Phillips #1 drive style ensures easy installation with common tools while minimizing cam-out, improving assembly speed and reliability.
• Precision Thread Fit: UNC coarse threads with Class 2A fit guarantee consistent engagement and ease of assembly, reducing the risk of cross-threading.
• Versatile Fully Threaded Design: The screw is fully threaded along its 3/16" length, offering maximum grip and adjustability in a wide range of material thicknesses.
• Regulatory Compliance: Meets ASME B18.13 specifications and is compliant with RoHS 3 and REACH, ensuring safety and environmental standards for global industrial use.

Professional Applications & Engineering Value

This 2-56 UNC Rounded Pan Head Phillips Screw with Lock Washer is engineered to address common industrial challenges such as vibration-induced loosening and corrosion. The combination of 18-8 Stainless Steel and a passivated finish provides exceptional resistance to moisture and chemicals, making it ideal for applications in machinery, electronics, and outdoor equipment. The internal-tooth lock washer, made from 410 Stainless Steel, bites into both the screw and the mating surface, creating a secure lock that maintains clamp force under continuous vibration. With its coarse UNC threads and Class 2A fit, it ensures quick, reliable installation without sacrificing performance. This screw is a trusted solution for assembly lines, automotive components, and precision instruments where durability and compliance with ASME B18.13 are critical.

Specification Summary & Compliance

This screw features a 2-56 UNC coarse thread with a Class 2A fit for precise dimensional accuracy and easy assembly. It is fully threaded and manufactured in compliance with ASME B18.13 standards. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, ensuring it meets stringent environmental and safety regulations for hazardous substances.