General Description:
Lexan or similar translucent material, dimensions approximate 0.688 in. Square by 0.562 in. High, yellow color, this key cap assembly, consisting of 1 key cap and 1 insert k plunger has black engraving, the characters to be 0.125 in. High and 0.020 in. Line width, the engraved lettering shall be opaque so lettering will appear black in a darkened room key caps are internally illuminated, this key cap is style or type j-4224, the character s asterisk bk asterisk and asterisk sp asterisk are engraved on this key cap, p/o key module assembly. Texas instruments, inc., p/n 684579-2, end item, automated radar terminal system - arts iii, texas instruments, inc., p/n 729408-1, manufacturer data george risk industries, inc. 24229 columbus, neb., p/n 2-128-004-2a
Federal Aviation Administration