Reply With Quote5/8 UNF if we are talking about smiths gauges.
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Thread: Mechanical oil pressure gauge
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06-04-21, 09:13 AM #1
Chief Engineer
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Mechanical oil pressure gauge
Hi does anyone know what size the big brass nut that goes over the bulb at the end of the capillary tube please??
Thanks
Lee.............never drive faster than your guardian angel.
cobraclub.com/gallery/showgallery.php/cat/633 - this is the link to my build photo's you have to put w w w . h t t p : / / in front of it!!
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06-04-21, 09:45 AM #2
Head Mechanic
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06-04-21, 11:57 AM #3
Head Mechanic
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Just to check, you have written pressure gauge but I assume you meant temp? There is no bulb on the end of the pressure gauge tube. The size I have given you is for the temp gauge bulb
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06-04-21, 01:02 PM #4
Chief Engineer
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Yes you're right, definitely the oil temp, it's the full sweep cobra oil temp gauge.the capillary and bulb are the same as the water temp.
Thanks,
Lee.............never drive faster than your guardian angel.
cobraclub.com/gallery/showgallery.php/cat/633 - this is the link to my build photo's you have to put w w w . h t t p : / / in front of it!!
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06-04-21, 02:03 PM #5
Head Mechanic
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- Maldon Essex
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Yes, water and oil temp are both 5/8 UNF.
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06-04-21, 06:15 PM #6
Chief Bottle Washer and Tea Boy
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- May 2003
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extract from merlin motorsport advert for a smiths mech temp gauge
‘Smiths Classic Mechanical Water Temperature Gauge. Reads from 30-110°C with 270° needle sweep. 52mm body diameter and comes with 6ft 6inch capillary tube with 3/8BSP female threaded bulb on the end, an adaptor is then fitted to go to 5/8UNF thread.”
The captive female nut on the capillary tube looks to be a 3/8 bsp, and it comes with a 5/8 unf adapter, which might need changing if what ever you are attaching to isn’t a 5/8.
4B2756F7-EF3B-4D4C-A466-918170FFFCCF.jpeg
hopefully the photo worksRoger
RamSC 351 Cleveland
on the road 20 years- nearly finished
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