Style DC & DP
Cam and Groove Cap and Plug

Available Sizes:

1-1⁄2″, 2″ or 2-1⁄2″

Available in aluminum only.
Handles and pins on cap are 316 stainless steel.
Meets A-A-59326B (MIL-C-27487).
Meets ASTM F1122.

Image, from left: Style DC, Style DP.