Re: Half Inch BSP or five eighths UNF

[John Caffrey <jdc6@Lehigh.EDU>]

Daniel1312@aol.com wrote:
> What's the consensus on the thread at the top and back of the block that the 
> union for the rigid oil pipe screws into (or oil cooler fitting and hose)?  
>Is 
> it half inch BSP or five eighths UNF?
>
> Thanks
>
>   
Hi Daniel,
I can screw a 5/8-18 NF bolt in there perfectly. From what I can find, 
1/2 BSP has an OD of ,825" and 14 threads/inch, too large.
John
Fogelsville, PA