Welcome: FASTEN WORLD GROUP LIMITED
| thread | length | hex |
| 3/16" | 15mm | 7mm |
| 1/4" | 15mm | 7mm |
| 5/16" | 16mm | 9mm |
| 3/8" | 18mm | 10mm |
| 6mm | 15mm | 7mm |
Tel：+86-573 86579161
Fax ：+86-573 86579161
E-mail: sales@fasten-world.com
Skype: fasten-world
