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Railway bolts and nuts are one of the most important railway fasteners in the railway system. Generally, railway bolts are used to fasten the ends of railway tracks together at joints.
The size of railway bolts varies with the requirements of the rail section. The proper diameter and length of railway bolts can be determined by consulting the applicable railway standards.
Types of Railway Bolts and Nuts:
Railway bolts can be divided into the following types, for example, round head oval neck railway bolts, diamond neck railway bolts, railway bolts NF F50-008, fishtail bolts, Russian standard railway bolts, clamp bolts, insert bolts for Russian foundations Railway special bolts such as bolts, T-bolt clamps, etc.
1. Fishtail bolt
HS26/HS32 fishtail bolts used for ribbed tie plates are available in the following sizes and conform to UIS864-2 Material: Q235, 35# and 45# Grade: 4.6, 5.6, 8.8 Surface: plain, black spray paint
| Type | Dimension | Weight (Kg) |
|---|---|---|
| HS26/55 | M22 ×55/40 Nut M22/H22/S39 | 0.45 |
| HS26/65 | M22 ×65/45 Nut M22/H22/S39 | 0.475 |
| HS26/90 | M22 ×90/45 Nut M22/H22/S39 | 0.549 |
| HS32/55 | M22 ×55/40 Nut M22/H22/S39 | 0.469 |
| HS32/65 | M22 ×65/45 Nut M22/H22/S39 | 0.503 |
| HS32/90 | M22 ×90/45 | 0.577 |
2. Clamping bolts and insert bolts for the Russian market
Material: Q235, 35#, 45# Grade: 4.6, 4.8, 5.6, 8.8 Surface: plain, black spray paint
| Item | Dimension | Weight (Kg) |
|---|---|---|
| Clamp bolt with nut | M22 ×75 M22/S36/H22 | 0.475 |
| Inserted bolt with nut | M22 ×175 M22/S36/H22 | 0.78 |
3.Clip bolt
| Standard Reference | Type | Finish | Grade | Raw Material |
|---|---|---|---|---|
|
UIC864-2 NF F 50-008 ISO898-1 |
M18, M20, M22, M24, M27, etc |
Plain & Oiled, Oxide Black, Zinc Plated, Hot Dip Galvanized, etc |
4.6 5.6 8.8 |
Low Carbon Steel Medium Carbon Steel |
4. Anchor bolts
| Standard Reference | Dia Type | Finish | Grade | Raw Material |
|---|---|---|---|---|
|
NF F50-010 DIN529 ISO898-1 |
M18, M20, M22, M36, (M16-M48) |
Plain & Oiled, Oxide Black, Zinc Plated, Hot Dip Galvanized, etc |
4.6 5.6 8.8 |
Low Carbon Steel Medium Carbon Steel Alloy Steel |
5. Hook bolt
| Standard Reference | Dia Type | Finish | Grade | Raw Material |
|---|---|---|---|---|
|
UIC864 DIN529 |
M20-M36 |
Plain & Oiled, Oxide Black, Zinc Plated, Hot Dip Galvanized, etc |
4.6 5.6 8.8 |
Low Carbon Steel Medium Carbon Steel Alloy Steel |
Application Rules of Railway Bolts and Nuts:
According to rail standards, each rail joint needs to be bolted, and at least two bolts in each rail are tightened to approximately 400 foot-pounds of torque, which creates a tension of 25,000 to 30,000 pounds in the rail bolts.
1. The track bolts in use must be of appropriate size and fastened in place.
2. The rail bolt must be installed together with the AREMA spring washer, and the nut must be installed against the spring washer.
3. The rail bolts must be installed, and the nuts must be installed alternately on the inside and outside of the rail.
4. When the rail bolt and joint bar are removed, the connection area of the rail and the contact surface of the joint bar must be cleaned, and the joint bars and bolt threads must be lubricated.
5. Safety standards require that it allows operation on all rails with missing or failed bolts.
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