| Nps DN  | 
    A (min)  | 
    Square Head Plugs  | 
    Round Head plugs  | 
    Hex Head Plug Flush Bushing  | 
  |||||
|---|---|---|---|---|---|---|---|---|---|
| B (min) | C (min) | D | L (min) | S | K (min) | H (min) | |||
| 8 | 1/4 | 11.0 | 6 | 9.5 | 13 | 41 | 16.0 | 3 | 6 | 
| 10 | 3/8 | 12.5 | 8 | 11.0 | 17 | 41 | 17.5 | 4 | 8 | 
| 15 | 1/2 | 14.5 | 10 | 14.5 | 21 | 44 | 22.0 | 5 | 8 | 
| 20 | 3/4 | 16.0 | 11 | 16.0 | 27 | 44 | 27.0 | 6 | 10 | 
| 25 | 1 | 19.0 | 13 | 20.5 | 33 | 51 | 35.0 | 6 | 10 | 
| 32 | 1-1/4 | 20.5 | 14 | 24.0 | 43 | 51 | 44.5 | 7 | 14 | 
| 40 | 1-1/2 | 20.5 | 16 | 28.5 | 48 | 51 | 51.0 | 8 | 16 | 
| 50 | 2 | 22.0 | 17 | 33.5 | 60 | 64 | 63.5 | 9 | 17 | 
| 65 | 2-1/2 | 27.0 | 19 | 38.0 | 73 | 70 | 76.0 | 10 | 19 | 
| 80 | 3 | 28.5 | 21 | 43.0 | 89 | 70 | 89.0 | 10 | 21 | 
| 100 | 4 | 32.0 | 25 | 63.5 | 114 | 76 | 117.5 | 13 | 25 | 
| DN | Length of  Thread  | 
    Square Head Plugs | Round Head plugs | Hex Head Plug | ||||
|---|---|---|---|---|---|---|---|---|
| Height of  Square  | 
    Width of  Flats  | 
    Diameter of  Round Head  | 
    End to End | width of  Flats  | 
    Hex  Height  | 
  |||
| A | B | C | D | L (min) | S | K | H | |
| 1/8 | 9.5 | 6 | 7.0 | 10 | 35 | 11.0 | 6 | |
| 1/4 | 11.0 | 6 | 9.5 | 13 | 41 | 16.0 | 3 | 6 | 
| 3/8 | 12.5 | 8 | 11.0 | 17 | 41 | 17.5 | 4 | 8 | 
| 1/2 | 14.5 | 10 | 14.5 | 21 | 44 | 22.0 | 5 | 8 | 
| 3/4 | 16.0 | 11 | 16.0 | 27 | 44 | 27.0 | 6 | 10 | 
| 1 | 19.0 | 13 | 20.5 | 33 | 51 | 35.0 | 6 | 10 | 
| 1-1/4 | 20.5 | 14 | 24.0 | 43 | 51 | 44.5 | 7 | 14 | 
| 1-1/2 | 20.5 | 16 | 28.5 | 48 | 51 | 51.0 | 8 | 16 | 
| 2 | 22.0 | 17 | 33.5 | 60 | 64 | 63.5 | 9 | 17 | 
| 2-1/2 | 27.0 | 19 | 38.0 | 73 | 70 | 76.0 | 10 | 19 | 
| 3 | 28.5 | 21 | 43.0 | 89 | 70 | 89.0 | 10 | 21 | 
| 4 | 32.0 | 25 | 63.5 | 114 | 76 | 117.5 | 13 | 25 |