Attachment A_Appendix A Drawing D2 Steel Tool Bars Dimensions and Tolerences.pdf

This document is a technical drawing/schematic diagram for air hardening tool steel components. The drawing depicts dimensional specifications and assembly details for what appears to be a cylindrical tool or component with multiple sections labeled A, B, and C. Key dimensional specifications include an overall length of approximately 12.500±0.001 inches and various internal measurements specified to tight tolerances of ±0.001 inches. The material callout specifies AISI D2 air hardening tool steel with a hardness requirement of 1850 HV (approximately 56 HRC on the Rockwell hardness scale).

The notes section establishes critical manufacturing requirements including that the federal shall be AISI D2 air hardening tool steel with a temperature-controlled hardening process and hardness specifications. Surface finish requirements call for rockwell hardened surfaces and ground finishes with maximum 8 microinches Ra surface roughness. Additional notes reference dimensions in inches with millimeter conversions and specify maximum allowable tolerances. The drawing includes a revision block and signature area indicating this is an active engineering document. This technical specification appears to be part of a federal procurement package for precision tool components requiring exacting dimensional and material specifications.