804-5959239 PLATE PATCHES DRAWING.pdf

This is a technical drawing document for plate patches and T-J bolts manufactured for the Naval Sea Systems Command. The drawing, dated October 26, 2007, provides detailed specifications and dimensions for various patch sizes and fastening components used in naval applications.

The document includes comprehensive tables of dimensions and weights for four primary product types: rectangular plate patches (sizes 1-4), round plate patches (sizes 1-4), hinged plate patches (sizes 1-3), and butterfly nuts (one standard size). Material specifications require ASTM A276 stainless steel for rods and bolts, with all welds to be TIG welds. General notes specify that patch assemblies include pin/locator bolts with split plans, all dimensions are in inches, and all welds must be inspected using ultrasonic inspection to ensure proper closure and gap elimination. Additional requirements mandate that mild steel parts be cleaned to remove scale and corrosion before aluminum application, with hinge extensions extending from the center hole to the plate-cut edge. The drawing explicitly states it is not for use by the supply system for procurement purposes and includes detailed fabrication and assembly notes for each component type, with specific attention to edge treatment, bolt specifications, and final inspection criteria.