S-92805A545 1/4"-20 x 1 1/2" Stainless Steel Thread-Locking Hex Drive Flat Head Screws

Key Features & Benefits at a Glance

• Permanent vibration resistance with nylon patch thread locker that maintains secure fastening in high-stress environments
• Superior corrosion protection through 18-8 stainless steel construction and passivated finish for extended service life
• High-strength performance with 70,000 psi tensile strength and Rockwell B55 hardness for demanding applications
• Wide temperature compatibility with locking effectiveness maintained from -65° to 250°F
• Precise flush mounting enabled by 82° countersink angle and flat head design for smooth surface finishes
• Reliable thread engagement with Class 3A thread fit ensuring consistent assembly quality
• Easy installation and removal with 5/32" hex drive providing positive torque transmission

Professional Applications & Engineering Value

These 1/4"-20 nylon patch lock flat head screws deliver critical vibration resistance in industrial machinery, automotive assemblies, and electronic enclosures where loosening under dynamic loads compromises safety and performance. The 18-8 stainless steel construction combined with passivated finish provides exceptional corrosion resistance in harsh environments, while the UNC coarse threads and Class 3A fit ensure rapid assembly with minimal cross-threading risk. The partially threaded design allows precise clamping force distribution, and the 82° countersink angle creates seamless flush mounting in precision-machined components. The permanent nylon patch locking mechanism eliminates the need for separate locking washers or adhesives, streamlining inventory and assembly processes while maintaining reliability across the specified temperature range.

Specification Summary & Compliance

Manufactured to precise dimensional standards with Class 3A thread fit and UNC 1/4"-20 coarse threads in right-hand direction. Features include 1-1/2" length with 1" minimum thread length, 5/32" hex drive, and standard flat head profile. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in regulated industries and international markets.