Wanted thread size wanted on 300 tdi drain plug? - Defender Source
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  #1  
Old March 23rd, 2016, 03:29 PM
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Mark Miller
1994 Defender 90NAS #1258
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Wanted thread size wanted on 300 tdi drain plug?

Bought No-Spill's plug system and they sent me the wrong size thread. It's coarser than the plug on my 300 tdi. NOW they want me to pull it (anybody see what's happening next?) to measure it for them.


read somewhere on a brit forum that it was 13/16 (20.5mm) head with 14tpi bsw. Does that sound right? The no-spill system is pretty cool, if they sell the right size.
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  #2  
Old March 23rd, 2016, 03:38 PM
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Ren Ching
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Skinny Pete
'84 90 "Yamelo"/'88 RRC "Chewbacca"
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it is 1/4" BSPP which is either 17 or 19 tpi. I know it was one tooth off from 1/4" NPT
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Present:
1960 SII 109"- "Red Square"
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