| Product name | Size (mm) |
| Inner diameter | 6.5 mm |
| Outer diameter | 7.8 mm |
| Length | 187 mm |
| HRC | > 52 |
-
Special materials, taking into account strength and toughness
;
-
Stress distribution design for increased durability
;
-
Inner scale indicates screw-in depth
;
- Special internal and external surface treatment to avoid reflection and rust
;
-
Bar processing with HRC>52
;