S-93310A266 10-32 x 3/4" ASME B18.3, ASTM F879, MIL-DTL-18240 Thread-Locking Stainless Steel Button Head Hex-Drive Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with permanent nylon patch ensures reliable fastening in dynamic applications, eliminating the need for secondary locking devices.
• Superior corrosion resistance from 18-8 Stainless Steel construction protects against rust and degradation in harsh industrial environments.
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding mechanical assemblies.
• Precision thread fit with Class 3A tolerance guarantees consistent engagement and reduces the risk of cross-threading or loosening.
• Wide temperature compatibility from -70° to 250°F allows stable operation in extreme thermal conditions without compromising lock integrity.
• Easy installation and removal with hex drive design provides secure tool engagement and efficient maintenance cycles.
• Full regulatory compliance meets ASME, ASTM, and MIL standards, ensuring quality and safety for critical applications.

Professional Applications & Engineering Value

This 10-32 UNF nylon patch lock screw is engineered to solve critical challenges in vibration-prone assemblies, such as machinery, automotive subsystems, and electronic enclosures. The permanent nylon patch locking technology creates consistent friction to prevent back-off under cyclic loads, reducing maintenance downtime. Manufactured from 18-8 Stainless Steel, it offers inherent corrosion resistance for outdoor or chemically exposed settings. The Class 3A thread fit and fully threaded design ensure uniform stress distribution and reliable clamping force. With a rounded button head and hex drive, it combines aesthetic appeal with practical installation, making it ideal for applications where both security and accessibility are paramount.

Specification Summary & Compliance

This screw features a 10-32 UNF fine thread with Class 3A precision tolerance for exact fitment. It complies with ASME B18.3, ASTM F879, and MIL-DTL-18240 specifications, ensuring adherence to rigorous industrial standards. The product is RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, confirming its safety for use in regulated environments without hazardous substances.