Screw spike/Rail screw/Lag bolt/Sleeper screw/ Coach screw/ Drive screw/ Timber screw
Standard:ASTM, BS, GB and  or according to customers’ specifications.
Model: Ss5. Ss8. Ss25 . Ss36 ...
Raw material : Q235,35#,45# ,40Mn2,20Mnsi
Dia.: from M16 to M60
Grade : 4.6/5.6/8.8
Finish:Plain, zinc plated, hot dip galvanized,Dacromet,etc.
Always assembly with double spring washer Fe6 or flat washer Uls7 and screw inserts.