The MS20470AD4-9 is a universal head solid aircraft rivet made from 2117-T4 aluminum alloy (AD series), designed for structural sheet metal assembly in certified aircraft construction and repair.

The “4” indicates a 1/8" diameter, while the “-9” dash number corresponds to a 9/16" grip length, making it suitable for relatively thin multi-layer sheet stacks where precise grip control is required. It is part of the MS20470 (AN470 equivalent) family, widely used in aviation structural work.

This rivet requires installation using a pneumatic rivet gun and bucking bar, meaning access to both sides of the structure is necessary. During installation, the shank is plastically deformed to form a shop head, creating a permanent structural joint.

Compared to softer “A” series rivets, the 2117-T4 AD rivets offer higher shear strength (~26,000 PSI) and are preferred for primary aircraft structures where fatigue resistance and long-term durability are important.

Common applications include fuselage skins, ribs, brackets, and general aircraft sheet metal assemblies where light-to-medium structural loads are present.

Key features include:

MS20470 universal head solid aircraft rivet
Size: 1/8" diameter × 9/16" length (-9 dash number)
Material: 2117-T4 aluminum alloy (AD series)
Approx. ~1000–1100 rivets per 1 lb package
High shear strength (~26,000 PSI)
Heat-treated self-aging alloy (improves strength after installation)
Universal head for primary/secondary aircraft structure
Corrosion-resistant coating (chromate or anodized per spec)
Requires rivet gun + bucking bar (double-sided access)
Standard replacement for AN470AD4-9 in aircraft maintenance
Used in fuselage skins, ribs, brackets, and sheet metal assemblies
Critical installation: correct grip length selection required