Special Features:

Items are being coded as critical to insure source inspection will be performed at the point of manufacture, prior to material receipt by the us navy or other dod components. These items are piece parts or end items in support of vital military hardware necessary to sustain the successful mission of the ships, submarines, and shore stations of the us navy. Critical features including, but not limited to, dimensions, tolerances/clearances, electronic characteristics, and metallurgical properties will bespecified for government q ar (quality assurance representatives) to insure the highest possible degree of quality and reliability of these parts being delivered under navicp contracts

Properties:

An item consisting of a framework with a grooved wheel or wheels, including flat surfaced wheels with flanges, fitted therein, so mounted as to provide an opening through which lines are passed. It is used to provide protection from chafing when oblique pull may occur, and/or to change direction of lines.