S-92805A121 2-56 x 1/4" Stainless Steel Thread-Locking Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Vibration-resistant locking with nylon patch thread locker maintains secure fastening in high-stress environments from -65° to 250°F
• Superior corrosion resistance through 18-8 stainless steel construction and passivated finish for extended service life
• Precise thread engagement with Class 3A thread fit ensures reliable performance in critical applications
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness withstands demanding loads
• Easy installation and removal with hex drive design and 0.050" drive size provides superior torque transmission
• Optimal flush mounting with standard flat head profile and 82° countersink angle for clean, professional finishes
• Regulatory compliance with RoHS 3 and REACH standards ensures environmental responsibility and global acceptance

Professional Applications & Engineering Value

These 2-56 UNC flat head screws deliver exceptional engineering value in demanding industrial applications where vibration resistance and corrosion protection are critical. The combination of 18-8 stainless steel material and passivated finish provides superior protection against harsh environments, while the nylon patch thread locker effectively prevents loosening under dynamic loads and thermal cycling from -65° to 250°F. The Class 3A thread fit ensures precise engagement in coarse thread applications, making these hex drive screws ideal for electronics enclosures, machinery assemblies, and aerospace components where reliability and regulatory compliance are paramount. The fully threaded design and right-hand threading provide consistent clamping force across the entire 1/4" length, offering engineers a dependable fastening solution for critical connections.

Specification Summary & Compliance

This 2-56 UNC flat head screw features precision Class 3A thread fit with coarse thread spacing and right-hand threading. Manufactured from 18-8 stainless steel with passivated finish, the fastener delivers 70,000 psi tensile strength and Rockwell B55 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance for industrial applications.