The ST3502-09 C-flange bolt is an aviation-grade structural fastener used in aircraft engine and airframe assemblies. It is designed with an integrated flange head to distribute load over a wider surface area, reducing the need for separate washers and improving joint stability under vibration and cyclic loading.

This type of bolt is commonly used in engine accessory mounting, structural brackets, and flange-to-flange connections where consistent torque retention and resistance to loosening are critical.

Key features include:

Aviation-grade C-flange bolt fastener
Integrated flange head for improved load distribution
Designed for high vibration and cyclic load environments
Provides secure fastening in engine and airframe assemblies
Compatible with aircraft structural and engine applications (model dependent)
High-strength alloy steel construction
Corrosion-resistant aviation hardware finish (variant dependent)
Reduces need for separate washers in flange joints
Suitable for certified aircraft maintenance and overhaul procedures
Used in engine accessory, bracket, and structural mounting systems