Technical Parameter
material |
1022A, hardening heat treatment |
diameter |
M3.5/M3.9/M4.2 /M4.8 or unstandard size |
length |
13mm-120mm |
finish |
black/grey phosphate, zinc plated |
thread type |
fine/twin fast thread, coarse thread |
head type |
bugle head |
packing |
1000pcs per box, or small packing as your request, or 25kg per carton |