The MS51861-35 is a military-standard self-tapping machine screw used in aerospace and aircraft assemblies where secure fastening into thin sheet metal or pre-formed holes is required. It is designed to cut or form its own thread during installation, reducing the need for pre-tapped threads and simplifying assembly in lightweight structures.

This screw is commonly used in aircraft interior panels, fairings, access covers, and light structural components where vibration resistance, ease of installation, and maintenance efficiency are important. The design allows repeated service access while maintaining reliable holding strength in aluminum or thin-gauge structures.

Manufactured to MS specifications, it is typically made from corrosion-resistant steel (often stainless or cadmium-plated alloy steel depending on variant), ensuring durability in aviation environments exposed to vibration, moisture, and temperature variation.

Key features include:

MS51861-35 aerospace self-tapping screw
100 pcs maintenance pack
Designed for sheet metal and light structures
Forms or cuts threads during installation
Used in aircraft interiors, panels, and fairings
Suitable for vibration and cyclic load environments
Corrosion-resistant steel construction
Allows quick installation without pre-tapping
Supports maintenance and rework operations
Direct replacement per MS aircraft hardware standards