ATTACHMENT 1.pdf

This document is a technical engineering drawing specification for a cast component assembly. The drawing depicts detailed cross-sectional views (Section 22-4A and Section 22-6D) with precise dimensional tolerances, material specifications, and manufacturing requirements for a niobium-cobalt alloy casting designed for seawater immersion applications.

The specification requires castings to conform to MIL-STD-278F, Category 1, Sub-Category D4 per General Note 7004. Per General Note 7008, parts must be Ni-Al-Br-Z castings in accordance with MIL-B-24480, suitable for complete immersion in seawater under normal operating conditions. Any weld repairs require post-weld heat treatment per MIL-B-24480, Section 3.3. Fabrication tolerances are governed by ANSI Y14.5M-1982, with specific allowances for castings, machining, and general dimensional work. Fillets and radii tolerances range from 0.06 to 0.26 inches depending on dimension size. Surface texture must comply with ANSI Y14.36-1978, and all threads must conform to FED-STD-H28. Angular tolerances are specified at ±1° for piping and ventilation ducting, ±0.5° for angle between hanged joints (50-minute to 120-minute range), and ±0.5° for all other applications. The document includes detailed machining allowances and comprehensive dimensional specifications critical for proper component fabrication and assembly.