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This document is a Vent Piece Fabrication Parts List containing technical specifications for ventilation duct components. The parts list specifies three primary assemblies: DVS98/VA05 (32x19 opening), DVS99/VA08 (44x19 opening), and their associated sub-components. Each assembly includes a main vent screen assembly and two reinforcement frame variants with 1 1/2-inch pitch screens. The parts are identified by multiple cross-reference systems, including Federal Supply Class Numbers (FCSC 5981 and 5991), catalog numbers, and drawing references (0450-FV-4510-02).

Fabrication requirements include drilling holes to match mating flange connections. Unit costs are specified for individual component quantities, with DVS98/VA05 sub-components priced at $5.35 per unit (SF 30 units) and DVS99/VA08 sub-components at $7.18 per unit (SF 30 units). Each assembly references corresponding technical drawings and related documentation, including GIBBS & COX drawing numbers and NAVSEA drawing references. The document indicates these are standardized naval/military specification parts with established catalog numbers and engineering standards.