Clean out plug leaking

[Geo422]

Cast iron stack clean out plug is leaking ,the old cast iron plug was completely rusty and no use at . So I put this plug in . Water is still dripping from the bottom of plug. Did I use the wrong one?or do something wrong? Any advice is appreciated. House is 1935 cast iron pipe heavy duty.two pictures are of the old plug that came out..

 

[Terry]

There are a few listed here in different sizes

https://www.homedepot.com/p/Oatey-4-in-Brass-DWV-Threaded-Raised-Head-Cleanout-Plug-42374/100346920

I see
3-7/8"
4"
4-1/2"

 

[Sponsor]

 

[Reach4]

Here is another kind: https://s3.amazonaws.com/s3.supplyhouse.com/product_files/LFP400-submittal.pdf

https://www.supplyhouse.com/Sioux-Chief-882-EB420-4-Raised-Head-T-Cone-SCH-40-FIP-Cleanout-Plug is another type that looks interesting.