Diameter: M16 - M30, 7/16" - 1-1/2",the length does not limit.
Material:Q235,35#,45#,40Mn2,20MnSi,35CrMo,42CrMo
Grade : 4.6/5.6/8.8/10.9/12.9
Finish : Plain,Black,zinc plated, H.D.G.,Dacromet,etc.


Suyu offers a wide range of products, track bolts and fastening systems for wood, concrete or steel sleepers.
Elastic clips: e1609, e1809, e1817, e2001, e2006, e2009, E2039, e2055, e2056...
Pandrol clips: PR401, PR309...
SKL clips: SKL1, SKL3, SKL12, SKL14, SKL15.....
Sleeper screws: Ss5, Ss8, Ss23, Ss25, Ss36 ...
Track bolts: oval neck, diamond neck
Hs clip bolts: Hs26 M22x55/65, Hs32 M22x55/65
Rail clamps: Kpo3, Kpo6, Kpo9
Fish plate:115 RE, 132 RE, 136RE, UIC50, UIC54, UIC60, TJ45, TJ57, BS60, BS75...
Spring washer: Fe6
Flat washer: Uls6, Uls7...
Dowels: Plastic and nylon dowels used for all kinds of screw spikes
Shoulders: Assembly with all kinds of Pandrol and E clips.
Rail pad: ZW 687, ZW700...
Insulators: Nylon insulators used for E clip sand Guide plates for SKL clips