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- - 410 Temperature gauge (https://www.bristolcars.info/forums/showthread.php?t=2496)

OakHouse411

09-11-26 12:41 PM

410 Temperature gauge

Help! My water temperature gauge has stopped working. What thread is the fixing nut union please?

David C

11-11-26 06:27 PM

Quote:

Originally Posted by OakHouse411 (Post 14212)

Help! My water temperature gauge has stopped working. What thread is the fixing nut union please?

From memory, the thread on the nut for the bulb is 3/8" BSP. The thread in the manifold is either 5/8" UNF or 1/4" NPT. They have the same diameter and pitch but NPT is tapered. A straight union should screw far enough in to a tapered hole on the manifold for a decent hold but will need a bit more thread sealant.

OakHouse411

11-11-26 08:27 PM

410 Temperature Gauge

Thank you David for the info

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