Essential M20*120 Screw Spike for Railroad Applications

• After-sales Service: Warranty
• Warranty: 3 Years
• Customized: Customized
• Shipping Cost: Estimated freight per unit.: about shipping cost and estimated delivery time.
• Currency: US$
• Return&refunds: You can apply for a refund up to 30 days after receipt of the products.
• Model NO.: M20*120
• Certification: ISO9001
• Type: Sleeper
• Surface: Plain Oil or HDG
• Grade: 4.6, 5.6, 8.8
• Material: Q235, 35# ,45#
• Size: M24*150
• Transport Package: Plastic Bags + Wooden Pallets
• Specification: M20*120
• Origin: China
• HS Code: 73181590
• Production Capacity: 500000pieces/Years

Product Description

The screw spike is also known as rail screw. As one kind of Rail spike, it is a metal screw for fixing rail fasteners. Screw spike is usually made of NO.3 steel. Because its nail rod surface has thread, so it is called 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. Due to disassembly and assembly inconvenience, it is difficult to adjust the rail gauge, which is generally used on the railway turnout.

For meeting various needs of clients, we can offer coach screws, stud screw, railway sleeper screws and other coustom screw spike in railway. 
As for the cost, the screw spike require higher cost than the dog spike but has the advantage of greater fixing power; approximately twice that of a rail spike, and can be used in combination with spring washers. 

First of all, screw testing should be implemented at the beginning of wire rod of the screw. The quality of precision screw is directly related to production of wire.

The second step is to inspect head screw forming. Mould testing is the most important for forming process of screw spike. Good mould is the premise that makes good screw spike. Then next step is to inspect production machine of screw spike, which is conducive to safe and smooth production. Formed screw spike should be inspected whether it is with any burrs or not and then be measured for its accurate size.

The third step is about detection of screw thread. The detection of thread pitch should also meet the requirements of customer and international standards.
The last step is the screw shipment inspection. The method is to pick out the screw spikes that are not qualified, and then leave the best quality screw spikes to the customer.
Size
 

Product	Specification	Material	Unit weight	Surface treatment
Screw Spike	M24*160	Q235	0.66kg/pc	Plain
	M21*149		0.61kg/pc
	M22*180		0.654kg/pc	Hot-dip galvanized