Nipple size ;) for spokes

What is the spoke nipple size for 1975 19" front and 18" rear wheels. I'm trying to source a custom set of nipples but I'm having a hard time with sizes, some are listed as gauge, some are listed with barrel diameter and length

Thanks

Sorry to be slow responding, artec; had to make a trip to the barn and dig up a salvage spoke, thread gauge, and caliper. OE spoke nipple dimensions for your bike are as follows. Thread: M4x0.7. Overall length: 19.4 mm. Drive size, flat-to-flat: 6 mm. The thread spec on that chart looks odd, unless they're specifying 11 threads and 0.7 mm. pitch. If there's an independent bike shop near you and you need to check out what they have, just take along an old NGK plug with the top removed. The stud on top of the plug is M4x0.7, and you can use it to check the fit. Good hunting!

And don't forget Spoke threads are rolled Not cut and Brit spokes of old have a weird size.

grizld1,

I do appreciate you taking time and measuring the nipple for me. In my build, I'm going for a very specific "look" and I need brass spoke nipples. The chart in my original post is from a German company ( https://www.wws-speichen.de/sortiment/ ) that makes custom spokes and nipples. So far this is the only one that responded to my inquiry. Thank you for your help.