Autolite Spark Plug BTF42 C5TF 12405-A nos set of 6 Brand new New old Stock

• Product: Autolite Spark Plug BTF42 C5TF 12405-A nos set of 6 Brand new New old Stock
• Brand: Autolite
• UPC:
• Manufacturer Part Number (MPN):

Hi,

these spark plugs are brand new in the box, just bought a whole car parts store with a lots of vintage stuff so visit my store often ,there will be very good deal and probably RARE FINDS too.

Sold as is as i can not test nothing but they are new in the box

What you see is what you get,please check the pics

IF YOU BUY MORE THAN 1 ITEMS, please request shipping price as I will combine shipping to make you a better deal on shipping.

Thanks for looking.

Denis

Identifying  Code On Autolite Spark Plugs.

Sample      AGR5M

First letter is thread diameter A=14mm, B=18mm, H=12mm,P=10mm, T=7/8"-18, 

Second letter is the reach. E=1/2 inch, G=3/4 inch, L=7/16 inch

Third letter is spark plug type F=tapered seat, K=surface gap, R=resistor, T=transport

Fourth number is heat range 0-3=cold, 4-7=medium, 8-11=hot,15=extreme hot. If there is a second digit number it would indicate the gap
1=standard gap, 2=power tip, 3=retracted gap

Fifth letter indicates application M=inboard marine, N=lowprofile insulator, S=shielded, W=small engine, PM=power mower, Y=small engine.

                      Understanding Autolite spark plug digital numbering system

                                                          415

Second number designates regular spark plug  even number designates resister