Guardrail screws are an important part of the guardrail system. Its function is to fix and connect the guardrail beams, guardrail beam and spacer block, spacer block and post together. It consists of three parts: bolts, washers and nuts.
Specification:
| Standards | JT/T281-1995 JT/T281-2001 GB/T18226-2000 GB/T1228-2006 |
| Level | Grade4.8 or Grade 8.8 |
| Material | Carbon steel, such as Q235 and No. 45 steel. |
| Sizes | M16*32,M16*35, used for connecting the guardrail beams and classified as grade 8.8 and grade 4.8;
M16*40, M16*45, M16*50 with grade 4.8; M16*150, M16*170 with grade 4.8 |
| Surface treatment | Hot dip galvanized or powder coated |
