#90341-18021 drain/fill plugs

#12157-10010 aluminum crush washers

there are steel washers available and im looking for the part # right now, i have used the aluminum everywhere and never had a problem with leakage though

Aluminum washers are designed for transfer cases, and aluminum transmissions (G, W & R series). Steel washer is designed for axle housings and steel transmissions (L series).

marlin sells these for $4 per washer with plug, and that isnt a bad price, it is about what the dealer charges for the item (not sure if marlins are steel or alloy washers though)

however i order them in bulk from an online toyota places like www.trdparts4u.com or www.1sttoyotaparts.com or www.toyotaoffroadparts.com and it is a lot cheaper