Y-2520-1 Rudder Stock.pdf

This technical drawing is a detailed engineering specification for a Rudder Stock, Nut, and Keys assembly for the U.S. Army Engineer District, Portland's Dredge Yaquina project. The document (Drawing No. Y-2520-1) provides precise dimensional and material specifications for the rudder components, which are to be manufactured from steel according to specific material grades (ABS Grade AB-2, ASTM A660 Class E, AISI 1018). The materials list indicates two each of rudder stock, nuts, upper keys, and lower keys are required for one shipset.

The drawing includes critical technical notes specifying manufacturing requirements, such as rudder stock forging specifications, welding guidelines, thread standards (AN30 threads), and tolerance parameters. Detailed technical views show the rudder stock's precise measurements, cross-sectional diagrams of the nut and key components, and technical annotations for manufacturing tolerances. The document is part of the W9127N25Q0035 solicitation for the Dredge Yaquina rudder overhaul, which is a small business set-aside under NAICS Code 336611 with a delivery deadline of 28 November 2025.