square head screw, rail sleeper screw
Minimum Order: 0
Quality/Safety Certification: 0.00
These rail sleeper screws are among the ISO9001-2008 certificates and the BV, SGS standards.
Square head screw/Rail sleeper screw/Screw spike
Type: Ss5, Ss8, Ss25, Ss36, etc
Raw material: Q235, 35K, 45#, 40Mn2, 20MnSi, etc
Grade: 4.6, 5.6, 8.8
Surface: plain(oil), black, zinc, hdg, etc