| Item Name | Ta/W Screw Flat Hd. 4-40 x 1/4" lg |
| Screw Size | 4-40 |
| Screw Length | 1/4 |
| (D) Basic Screw Diameter (Max) | 0.112 |
| (A) Head Diameter (Min) | 0.200 |
| (A) Head Diameter (Max) | 0.225 |
| (H) Total Head Height (Min) | 0.055 |
| (H) Total Head Height (Max) | 0.067 |
Material Purity  | Tantalum 97½% / Tungsten 2½% |
| (J) Slot Width (Min) | 0.031 |
| (J) Slot Width (Max) | 0.039 |
| (T) Slot Depth (Min) | 0.020 |
| (T) Slot Depth (Max) | 0.030 |