I bought four of these washers from a local NAPA (https://www.napaonline.com/en/p/NDP7041081) that is the correct web page & part number. First time I went there, I got what were obviously fiber washers. Last time I bought these (asking for the same part number), the guy handed the four that are in the pic.
I called the store today, and had the guy look up the washers with the part number, and he stated that they were fiber in the description, but he agreed with me that they looked like hard black rubber. The first ones I bought (IIRC) were a bit more brown.
I want to use these as drain plug gaskets for ATF drains for my vehicles. The size is correct (18 mm ID). And I don't suppose that NAPA would sell washers that were not suited for the application, but I'm wondering. I would rather return these, and go with aluminum (OEM recommendation) if there was even a chance that these would not hold up for the next 30K, which is when I would be doing the atf drain after this. From here on out, I will probably just buy the aluminum, but for a while I was thinking that fiber was what I wanted to be using for applications like this.
But for now, my question is simply what to do with these--are these ok for my purpose or not? If it were keeping my windshield wiper fluid I'd just use them, but for atf I really want to use the right product.
I called the store today, and had the guy look up the washers with the part number, and he stated that they were fiber in the description, but he agreed with me that they looked like hard black rubber. The first ones I bought (IIRC) were a bit more brown.
I want to use these as drain plug gaskets for ATF drains for my vehicles. The size is correct (18 mm ID). And I don't suppose that NAPA would sell washers that were not suited for the application, but I'm wondering. I would rather return these, and go with aluminum (OEM recommendation) if there was even a chance that these would not hold up for the next 30K, which is when I would be doing the atf drain after this. From here on out, I will probably just buy the aluminum, but for a while I was thinking that fiber was what I wanted to be using for applications like this.
But for now, my question is simply what to do with these--are these ok for my purpose or not? If it were keeping my windshield wiper fluid I'd just use them, but for atf I really want to use the right product.