Hex head bolts partially threaded
BN 57Hex head bolts partially threaded
BN 57- 표준
- DIN 931 (Standard withdrawn) ISO 4014 ~UNI 5737 ~ČSN 021101
- Headform
- Hexagon
- Drive
- Hexagon
- Thread
- partially threaded
- Material
- Steel
- Property class
- 8.8
- Surface
- zinc plated blue