S-96562A537 1/4"-20 x 1/2" ASME B18.6.3 Thread-Locking Stainless Steel Pan Head Phillips Screws

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon patch thread locking technology, preventing loosening in high-motion environments
• Excellent corrosion resistance with 18-8 stainless steel construction and passivated surface treatment for extended service life
• Wide temperature tolerance from -70°F to 250°F, maintaining locking performance across diverse operating conditions
• High-strength reliability with 60,000 psi tensile strength and Rockwell B70 hardness for demanding applications
• Easy installation and removal with Phillips No. 3 drive and standard pan head design for efficient assembly
• Precise thread engagement through Class 2A UNC coarse threads ensuring consistent fastening performance
• Full thread coverage along the entire 1/2" length for maximum gripping strength and load distribution

Professional Applications & Engineering Value

These nylon patch locking screws provide critical vibration-resistant fastening solutions for industrial equipment, machinery, and automotive assemblies where constant motion and thermal cycling compromise traditional fasteners. The 18-8 stainless steel construction combined with passivated finish delivers exceptional corrosion resistance in harsh environments, while the UNC coarse threads with Class 2A fit ensure rapid installation and reliable performance. The pan head design with Phillips drive offers superior torque transmission and flush mounting capabilities. Engineered to maintain locking integrity across a broad temperature range from -70° to 250°F, these screws eliminate the need for separate locking washers or adhesives, streamlining assembly processes while providing permanent vibration-resistant security in critical applications.

Specification Summary & Compliance

This 1/4"-20 x 1/2" locking pan head Phillips screw features precise Class 2A thread fit with UNC coarse threading and full thread coverage. Manufactured to ASME B18.6.3 specifications, the fastener delivers consistent dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors. With 60,000 psi tensile strength and Rockwell B70 hardness, these screws meet rigorous industrial standards for mechanical performance and reliability.