![](https://res.cloudinary.com/mitmuseum/image/upload/t_800/media-internal/HH.6.186.jpg)
3/8" Pipe Flange.
![](https://res.cloudinary.com/mitmuseum/image/upload/t_800/media-internal/HH.2.01221.jpg)
Description
A record of casting production for pattern number 1221. Pattern sketch on recto. Inscription on recto reads "2 1/4" dia. 1/8" thick." "Dr. No. 53-40".
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![](https://res.cloudinary.com/mitmuseum/image/upload/t_800/media-internal/HH.6.186.jpg)
A record of casting production for pattern number 1221. Pattern sketch on recto. Inscription on recto reads "2 1/4" dia. 1/8" thick." "Dr. No. 53-40".