Anyone have a vintage accel plug catalog or know what the 241871 plugs are for heat range wise. Thanks,

try calling accel
I may have a catalog but would take some time to find it. Might also check ebay
The again for the cost of a set of plugs is it worth the effort ?

I did the google thing but did not find anything and the accel web was worthless too. Your not sugguesting just throw them away are you I know they would work hemi or small block, but knowing heat range would be helpful. Newer accel catalog just doesn't address it, or the cross reference I have seen. Accel changed hands too many times I guess.

Not necessarily but maybe put them aside until you can find the info. in about 2-3 ,months I'll have more time to look for the catalog if I have one? but right now I don't, I'm working 7 days a week and get an hour or two to myself. message me in a couple of months if you'd like

hi

what is the number printed on the plug ?

insulator 434, plug metal casing has the last 5 of the plug number.

So we did find a vintage catalog. Here is the 6 digit part number chart from the book.

First: 2 Standard plug, 3 Resistor plug
2nd: Thread size 1=10mm, 2=12mm, 4=14mm, 8=18mm
3rd: 1=gasket, 2=taper
4th: Heat range. 9=Hottest, 0= coldest
5th: Reach: 1=1/4", 2=3/8", 456.....7=3/4" and 8=3/4" with 3/8th thread
6th Electrode: 1=Regular; 2=Extended, 3=Multi-Reg, 4=Multi-Extend, 5= Platnium, 6= Recessed

So this is a regular tipped version of the hemi or small block, in a pretty hot range. Champion 16 equivalent.
The necessary plug would be a 241X72. With X being heat range.