Its M3 stud screws into a tapped part or into another spacer; the next part is fixed by a UNC4-40 screw in its tapped end.
Nickel-plated brass: a good electrical conductor, with a silver finish that protects it from corrosion.
Material: leaded nickel-plated brass.
These hexagonal threaded spacers (male/female thread) come in several lengths so as to match your requirement precisely. The unit price of each pack is shown before you add it to the cart.

| Reference | LAI-MF-UNC4-40_M3-SW5-L5-T8-100 |
|---|---|
| Type | Male-female |
| Material | Nickel-plated brass, leaded, leaded |
| Thread | UNC4-40 / M3 |
| Across flats | 5 mm |
| Body length | 5 mm |
| Stud length | 8 mm |
| Tapping | depth 3 mm |