In the brake industry sir, there is a number that designates the pad shape, thickness, etc. That is the industry pad number. If you look at any brake pad, you will find commonality between certain vendors who use the industry pad number and others who don't but generate their own number. Lets explore the options for the front of the TJ which is the industry pad number 477.
Centric uses the industry pad number along with a 3 digit prefix in front of the . to denote compound, and then 5 places after that. The first 4 places are for the IPN, the last place is for a code that represents a difference to the pad number that changes the pad standard in some way.
Here are some screen shots of the selections on Rock Auto.
It is common for some to use the IPN with a D and in the D52 pad for the GM front caliper that is so common. If you peruse the offerings, you see some common numbers. 477, 964, 981 in the various part numbers.
477 is 90-06 Wrangler, ZJ, MJ, YJ, XJ, so on and so forth. If you want to check, click on the blue part number and it will bring up a buyer's guide that shows you all the models that part is used on.
964 is a rear pad on the TJ and others, mostly Liberty.
981 is also a rear pad and is a substitute for the original 964.
What you also note as missing on RA is the . after the first 3 numbers that Centric uses to signify compound.
What I find interesting is just how many pad shapes there are. Just exploring Jeep options they have them up to 1405.
I use the industry pad number because it is common and easy and there is never any confusion as to what the pad shape is. I'm going to type this from memory- 833 Sport Trac. 1084 Ram front 08, 1273 JK front, 652 Explorer, and on and on. The only thing that means it what the pad shape is, no more, no less.
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