gas - Dryer calls for 1/8 NPT plug - why not just direct connection? - Home Improvement Stack Exchange

Any ideas why this dryer gas connection diagram calls for the "1/8" NPT Pipe Plug" - why isn't it just calling for a direct connection to the gas supply instead of having something t

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gas - Dryer calls for 1/8 NPT plug - why not just direct connection? - Home Improvement Stack Exchange

Why won't this 3/8 male connector for a natural gas dryer fit a 3/8 female connector? - Home Improvement Stack Exchange

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