S-93705A717 1/4"-28 x 3/4" ASME B18.3 18-8 Stainless Steel Thread-Locking Socket Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with integrated nylon patch maintains secure fastening in temperatures from -70° to 250°F, preventing loosening in dynamic applications
• Superior corrosion resistance from 18-8 stainless steel construction ensures long-term reliability in harsh industrial environments
• Precision thread engagement with Class 3A UNF fine threads provides superior clamping force and vibration resistance compared to standard threads
• High-strength performance with 70,000 psi tensile strength and Rockwell B70 hardness withstands heavy loads and repeated assembly
• Optimal drive security through hex socket design prevents cam-out and allows high torque application in confined spaces
• Full regulatory compliance with ASME B18.3, RoHS 3, and REACH standards ensures quality and environmental responsibility
• Consistent dimensional accuracy through standardized manufacturing guarantees reliable fit and interchangeability

Professional Applications & Engineering Value

This 18-8 stainless steel socket head cap screw delivers exceptional engineering value in precision applications where vibration resistance and corrosion protection are critical. The 1/4"-28 UNF fine threads with Class 3A fit provide superior thread engagement for high-stress applications, while the integrated nylon patch thread locker eliminates the need for separate locking compounds in assembly operations. Engineered for machinery, automotive, and aerospace applications, these socket head screws maintain their 70,000 psi tensile strength and Rockwell B70 hardness under demanding conditions. The combination of stainless steel material and precision manufacturing makes these fasteners ideal for CNC equipment, precision instruments, and industrial automation systems where reliability and repeatability are paramount.

Specification Summary & Compliance

Manufactured to ASME B18.3 specifications with Class 3A thread fit for precision applications. Features 1/4"-28 UNF fine threads in right-hand direction with full threading. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards. Temperature rating for nylon patch thread locker ranges from -70° to 250°F. Material certification includes 18-8 stainless steel with Rockwell B70 hardness and 70,000 psi tensile strength.