Screw spike/Rail screw/Lag bolt/Sleeper screw/ Coach screw/ Drive screw/ Timber screw
Standard:ASTM A66-87, NF F50-006, UIC864-1 or according to customers' specifications.
Model: Ss5, Ss8,Ss23,Ss25,Ss35,Ss36 ...
Raw material : Q235,35K,45# ,40Mn2,20Mnsi,42CrMo
Dia.: from M16 to M60
Grade : 4.6/5.6/8.8
Finish:Plain,black, zinc plated, hot dip galvanized,Dacromet,etc.
Always assembled with double spring washer Fe6 or flat washer Uls7 and screw inserts.