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Hey Folks

Checking with those in the know…… the thread size on the oil pressure switch for a grey motor that screws into the block. I believe it is 1/4” BSPT. The male thread is tapered?

Thanks
Stephen

Methinks 1/4 NPT, but I could be wrong.

Cheers,
Harv

Harv is correct NPT it is. No BSP on Holden engines.

Dr Terry

Thanks guys, appreciate your help.

Regards
Stephen