Sprue bushings
| Product name |
M-SBA | M-SBC |
| Type | Bolt hole, Straight type (Futaba original) |
|
| Material | SK3 | SKD61 |
| Heat treatment hardness |
No heat treatment |
48HRC or more |
| Product name |
M-SBB | M-SBD |
| Type | Shoulder, Straight type (Futaba original) |
|
| Material | SK3 | SKD61 |
| Heat treatment hardness |
No heat treatment |
48HRC or more |