The MS20470AD6-8 is a universal head solid aircraft rivet used in primary and secondary aircraft structure assembly, including fuselage skins, ribs, brackets, and general airframe sheet metal work. It belongs to the MS20470 “AD” series, which indicates 2117-T4 aluminum alloy (the most common aircraft-grade solid rivet material due to its balance of strength and workability).

This specific -8 dash number corresponds to a 3/16" diameter rivet with a 1/2" length, making it the shortest common grip length in the AD6 series. It is typically used for thin sheet stacking where minimal material thickness is present, reducing the risk of oversized shop heads or structural distortion during bucking.

The AD designation (2117-T4) means these rivets are naturally aging aluminum alloy rivets that can be driven in a relatively soft condition and then harden over time, improving long-term shear strength after installation.

Key features include:

MS20470 universal head solid aircraft rivet
Size: 3/16" diameter × 1/2" length (-8 dash number)
Aluminum alloy 2117-T4 (AD series)
Approx. ~430–460 rivets per 1 lb package (supplier dependent)
Heat-treatable/self-aging rivet alloy for improved final strength
Designed for bucked installation (requires access to both sides)
Universal head suitable for general aircraft structural use
Common in thin sheet assemblies and light structural joints
Corrosion-resistant with chromate conversion coating (MIL-C-5541 typical)
High fatigue resistance in aircraft vibration environments
Widely used in certified and experimental aircraft construction
Must be selected carefully to match grip length to material stack (critical for proper shop head formation)