10-05-2019, 09:59 PM
(This post was last modified: 10-05-2019, 10:02 PM by Colin Wilks.
Edit Reason: Duplication
)
My sump plug measures .737" over the male thread and is 14 tpi. I think this is a bastard size, in the same way the starter dog is. The so called "Admiralty" threads are I believe a throw back to ministry work Austins did in the First World War.
Standard 3/4 BSW is 10 tpi and BSF 12 tpi. I cannot swear to it but the sump plug thread form appears to me to be Whitworth (55°), or what some refer to as "Whitform".
PS. In the time it took me to go out to the garage Hedd has answered.
Standard 3/4 BSW is 10 tpi and BSF 12 tpi. I cannot swear to it but the sump plug thread form appears to me to be Whitworth (55°), or what some refer to as "Whitform".
PS. In the time it took me to go out to the garage Hedd has answered.