j9fd3s

iTrader: (3)

As part of our trying to figure out how Mazda fasteners are sized, we have run across an easy one, crush washers.

the Mazda sample number, 9956-41-400, decodes like this
9956 = crush washer
4 = Material, 4 = Aluminum, 2 = Copper
1400 = ID in mm, so 14 is 14mm. the sizes go from 6mm to 22mm.

so some samples, the transmission uses an 18mm washer, so 9956-41-800 is an 18mm aluminum washer, 9956-21-800 is copper.
the oil drain plug is 14mm, 9956-41-400, in aluminum, 9956-21-400 in copper.

its kind of nice because the part number tells you the size, or the size tells you the part number

mazdaverx713b

iTrader: (91)

That's incredible, thank you for sharing!!!

Banzai

iTrader: (13)

It's nice when engineer's actually use common sense to devise things. I have a question. If a 1-400 = 14mm ID and 1-800 is 18mm, then would a 1-000 be 10mm and 0-800 be 8mm?

j9fd3s

iTrader: (3)

yep, that is exactly right.

so 9956-20-800 is an 8mm Copper washer, 9956-21-600 is a 16mm aluminum washer.

diabolical1

iTrader: (3)

neat. real neat.

mazdaverx713b

iTrader: (91)

It does make a lot of sense now. Will definitely help because I need some new slave cylinder hose crush washers!

j9fd3s

iTrader: (3)

9956-41-000... i looked it up :P

mazdaverx713b

iTrader: (91)

Awesome, thank you very much!!