| Threads | For Unified Threads | For Metric Threads |
| Class | 2B | 6H(M1.6~), 5H(M1~M1.4), Old JIS Class 2 |
| Flutes | YAMAWA G Class | YAMAWA G Class |
| Oil Grooves | 5/16 ・3/8 = 3, 7/16 ・1/2 = 4 | ~M2.6. = 0, M3~M7 = 4, M8=3, M10~ = 4 |
| Chamfer Length | P = 4P (For Through Hole), B = 2P (For Blind Hole) | P = 4P (For Through Hole), B = 2P (For Blind Hole) |
| Surface Treatment | Oxide | Oxide |
