Y-2520-1 Rudder Stock.pdf

This technical drawing is a detailed engineering blueprint for a Rudder Stock, Nut, and Keys assembly for the U.S. Army Engineer District, Portland, specifically for the Dredge Yaquina vessel. The document (Drawing No. Y-2520-1) provides comprehensive dimensional specifications for manufacturing the rudder components, including precise measurements and material specifications for each part.

The materials list indicates the components will be constructed from steel, specifically ABS Grade AB-2 for the rudder stock and AISI 1018 for the nuts and keys. Notable technical notes include requirements for rudder stock forging to meet ABS Grade AB-2 equivalent specifications, certification papers for the material, welding specifications (stainless steel clad weld with specific dimensional requirements), and threading specifications (AN30 thread standards). The drawing includes detailed technical views of the rudder stock, nuts, and keys, with precise dimensional callouts and tolerances, intended to support the U.S. Army Corps of Engineers' maintenance and repair requirements for the Dredge Yaquina vessel.