
Replaced propane fittings on our 2003 Nash trailer. This particular trailer used a 1/4" NPT thread on the regulator. The outside diameter of the 1/4" male NPT thread is approximately .520. First I figured it was 1/2" since I didn't really understand NPT threads. The new propane pigtails we ordered were 1/4" inverted flares. This brass adapter made the change easy.

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