The MS51959-29 is a military-standard machine screw with an 82° countersunk flat head, used in aerospace applications where a flush surface finish, lightweight construction, and reliable fastening are required. The countersunk head allows the screw to sit level with the surface, making it suitable for aerodynamic panels and finished interior assemblies.

This screw is commonly used in aircraft interior structures, access panels, fairings, and light-duty airframe components where space is limited and vibration resistance is important. It provides secure fastening while maintaining a smooth exterior profile.

Manufactured to MS specifications, it is typically made from corrosion-resistant stainless steel (18-8 / 300-series) with a passivated finish, ensuring durability in aviation environments exposed to moisture, vibration, and temperature variation.

Key features include:

MS51959-29 aerospace machine screw
82° flat countersunk head (flush mount)
#6-32 UNF thread
Stainless steel (18-8 / 300-series) construction
Passivated corrosion-resistant finish
Phillips drive for standard tools
Used in aircraft panels, fairings, and interiors
Suitable for vibration and cyclic load environments
Lightweight aerospace fastener
Direct replacement per MS aircraft hardware standards