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A rail screw spike, also called sleeper screw, rail screw or lag bolt, is a medium or large metal screw used to fasten a rail base plate or rail. Such spikes are always fastened into holes bored into the tie sleeper, sometimes together with imbedded plastic dowels, popularly used for rails with wooden sleepers, especially in America and Canada.

Production Process to the screw spikes:

• Raw Material

• Wiredrawing

• Rod Cutting

• Head Forming

• Edge Cutting

• Thread Rolling

• Heating Treatment

• Surface Finish

• Inspection

• Packing

• Shipment

For types of sleeper screws, Ss series are the top hot sales, with various sizes available. In addition, square head screw spike, hexagon screw spike, double head screw spike, dog screw, timber screw, and others.

SS25, SS35, SS36  Sleeper screw

• Size: 24×L, L=150mm to 270mm

• Grade: 5.6, 8.8

• Standard: ISO898-1, UIC864-1, NF F500-50

• Surface finish: plain oiled, blasted oiled, oxide black, zinc plated, HDG, Dacromet, and sherardizing.

AS screw spike

• Mechanical properties: UTS550-700N/mm2, 15% elongation.

• Standard: BS64 normal strength

• Surface finish: plain oiled, blasted oiled, oxide black, zinc plated, HDG, Dacromet, and sherardizing.

24×185mm alloy steel screw spike

• Size: 24×185mm

• Material: alloy steel

• Grade: 8.8

• Standard: GB/T3098.1

• Surface finish: plain oiled, blasted oiled, oxide black, zinc plated, HDG, Dacromet, and sherardizing.

Tr thread screw

• Size: Tr22×L, Tr23×L, L=115mm to 165mm, with step of 5mm

• Grade: 4.6, 5.6, 8.8, 10.9

• Standard: NF F500-15, UIC864-1, ISO898-1

• Surface finish: plain oiled, blasted oiled, oxide black, zinc plated, HDG, Dacromet, sherardizing

Timber screw

• Size: Dia. 15/16’’, 1’’, L as ordered 16×115, 19×115. Dia. 3/4’’ ×L, L=12’’

• Material: low carbon steel Q235

• Mechanical properties: Min tensile strength 740000psi

• Surface finish: black oil, Wax dipped

Chex screw spike

• Size: 25×190mm   24×180mm

• Grade: 4.6, 5.6, 8.8

• Standard: AS1085.18

• Surface finish: HDG

Any other type can be customized according to customers’ drawings and grade.