This is the fitting at the bottom of a SBC oil pan that receives the Banjo Bolt and Dip Stick Tube.

Part No 21 on this diagram

http://www.perfprotech.com/store/ass....aspx#assembly

I have the bolts. The charts say "NLA" or no longer available. Anyone have any of these laying around or know where to get 2?

Part number 821504 is still an active number from mercruiser. Try a different website or local dealer. They will most likely need to order it from Merc for you.

Try putting your part number in this link, It doesn't say NLA
http://www.mercruiserparts.com/partsByNumber.asp

Good luck.

I had an issue locating a shutter arm for my silent choice, everyone said it was NLA. I use MarineEngine.com for hard to find parts.