I am inexperienced in the standard pipe, hose and thread sizes, but I do understand that the trade sizes don't necessarily equal the dimensions of the components. I am trying to understand this exactly, so I am looking for some help to clear up some questions. I have already tried to research it online.
It was stated earlier in this thread that the oil line connectors are 5/8" BSP. I looked that up, and found it means the thread outer diameter is 0.9020 inches, and there are 14 threads per inch. Are they BSPP or BSPT?
What I don't know is does specifying "5/8 BSP" specify the hose size as well? All the web sites I have found that describe the BSP standard only refer to it as the thread size, and say nothing of the hose or pipe size. (Those sites seem to make the implicit assumption that the reader already knows this.) If I look at the Pegasus Auto Racing site, its 5/8 BSP hose fitting is described as follows:
"5/8 ID Hose End, 5/8 BSP"
and is to be used with their 5/8 inch inner diameter hose (which is 0.9 inch outer diameter). But, given that they state both hose size and BSP size, it leads me to naturally wonder if they were just being redundant in their description, or if connectors are sometimes made with varying hose sizes for a given thread size. (I am guessing not, but would like someone who really knows this stuff to confirm.)
Given that Lotus used 5/8 BSP thread connectors, does that mean the stock hose is 5/8 inch inner diameter and 0.9 inch outer diameter? If that is true, then the Pegasus barbed 5/8 BSP hose end should work with the stock hose, correct?
I have asked about the oil hose and connector measurements in other threads, but no answer so far. I have a leaking hose end right now, and want to make sure that I fix it the first time correctly, and soon. I want to keep the stock hose, and so want to make sure I know the stock hose and connector sizes exactly.