Ss25 Rail Screw Spike

WHAT IS Ss25 RAIL SCREW SPIKE?

Ss25 Rail screw spike, also called Ss25 sleeper screw, Ss25 rail screw or Ss25  lag bolt, is a medium or large metal screw used to fasten a rail base plate or rail. Ss25 rail screw spike provides a mechanical interlock that delivers more than twice the holding power of conventional hammered rail spikes. Ss25 Rail Spike is used to fix the tie plate or fasten the rail to the concrete sleeper with the help of plastic dowel.  Usually, it is with a ULS7 washer to fasten a tie plate or wood sleeper. The weight of Ss25 screw spike is 0.635KG.

RAW MATERIAL

Ss25 Screw spike is usually made of Q235,35#,45# steel in China. As its nail rod surface has thread, it get its name as screw spike. The pull-out resistance is 0.5 ~ 1.0 times larger than that of common rail spike, but the thrust resistance is 50% less. 

SURFACE TREATMENT

PLain oiled, Blasted oiled, Oxide black, Zinc plated, HDG, Dacromet, Sherardizing or according to requirements of customer.

Drawing and Weight of Ss25 Screw Spike

Standard: Vossloh

Material & Grade: Grade 4.6 of material Q235, Grade 5.6 of material 35K, Grade 8.8 of material 45#, Grade 10.9 of material 40Cr.

Properties: 

Tensile: 74,000 PSI MIN

Yield: 37,000 PSI MIN

Elongation: 18% MIN

FIX POWER

Ss25 rail screw spike requires higher cost than the dog spike. But it has the advantage of greater fixing power; approximately twice than a rail spike, and can be used in combination with spring washers. Its properties is usually as below:

Tensile: 74,000 PSI MIN

Yield: 37,000 PSI MIN

Elongation: 18% MIN

For some high tension screw spike,its properties are able to be following:

Tensile: 120,000 PSI MIN

Yield: 80,000 PSI MIN

Elongation: 18% MIN

Signum Rail Fastening furnishes many types of Screw Spikes used in tie plates, hook twin tie plates or other areas where rigid fastening is required.