The MS51959-47 is a military-standard machine screw used in aerospace and aviation applications where lightweight, corrosion-resistant, and flush-mounted fastening is required. It features a 82° flat (countersunk) head with Phillips drive, designed to sit flush in countersunk holes for smooth surface finishes on aircraft structures and panels.

This screw is commonly used in aircraft fairings, interior panels, access covers, and light structural assemblies where low profile and vibration-resistant fastening are important. It is a standard 8-32 UNF machine screw with a 3/4 inch length, making it suitable for a wide range of general aviation installations.

Manufactured from 18-8 / 300-series stainless steel, it provides good corrosion resistance and durability in aviation environments. It is typically passivated and may have slight magnetic response depending on alloy condition.

Key features include:

MS51959-47 aerospace machine screw
8-32 UNF thread, 3/4 inch length
82° countersunk flat head
Phillips drive for standard installation tools
Stainless steel (18-8 / 300-series) construction
Corrosion-resistant passivated finish
Used in aircraft panels, fairings, and interior assemblies
Suitable for vibration and cyclic load environments
Flush mounting for aerodynamic surfaces
Direct replacement per MS aircraft hardware standards