AN3-12A Bolt | 3/16″ Diameter, Undrilled

AN3-12A Bolt – Cadmium Plated Steel, 3/16″, Undrilled

The AN3-12A is a high-strength alloy steel aircraft bolt manufactured to military (AN/NASM) standards, designed for use in structural and general-purpose fastening applications. Featuring a 3/16″ diameter (AN3) and undrilled shank (A suffix), it provides reliable clamping force and long-term durability.

The bolt is cadmium plated for corrosion resistance and consistent performance in demanding aviation environments. Manufactured in accordance with NASM6812 specification, it is widely used in certified aircraft, maintenance operations, and overhaul applications.

Key Features

• AN3 standard – 3/16″ diameter aircraft bolt
• Undrilled shank (A suffix) – for applications not requiring safety wire
• Hex head design – standard aircraft tooling compatibility
• Cadmium plated alloy steel – corrosion-resistant finish
• High tensile and shear strength
• Manufactured to AN / NASM6812 standards

Typical Applications

• Aircraft structural assemblies
• Control linkages and brackets
• General airframe fastening
• Maintenance and overhaul applications

The AN3-12A bolt is commonly used across a wide range of aircraft including Cessna, Piper, Beechcraft, and experimental aircraft, making it a standard component for maintenance shops and aircraft owners.

Understanding AN3-12A Designation

AN3 indicates a 3/16″ diameter bolt, 12 represents the length in 1/8″ increments (1.5″), and the A suffix means the bolt has an undrilled shank.

Commonly Used With

• AN365 / MS21044 self-locking nuts
• AN310 castellated nuts (for drilled bolts)
• AN960 washers (standard and large area)