As for the components of SKL railway fastening system, including SKL rail clips, rail pad, screw spike, tie plate, washer, plastic dowel, track bolt and nuts, etc. common sizes of SKL rail fastening system include SKL 12, SKL 14 and SKL 3 rail fastening system.The Vossloh SKL-12 fasteners are ballastless railroad fasteners and are separate fasteners for sleeper track panels without concrete shoulders.

Dimensions and Material of SKL12 Rail Fastening System
| Item No. | Description | Specification | Material |
|---|---|---|---|
| 1 | Fish Bolt | 22×135, 24×135, 24×145 | Q235 |
| 2 | High-strength Fish Bolt | 22×135, 24×135, 24×145 | C45 |
| 3 | Insulated Bolt | 22×160, 24×160, 24×170 | C45 |
| 4 | T type bolt | M24x110 | Q235 |
| 5 | Flat Washer | 6×25×50 | Q235 |
| 6 | Spring Washer | 20×8, 24×8, 26×8 | ? |
| 7 | Double Spring Washer | 26×8 | ? |
| 8 | Screw Spike | M22x185, M24x195 | Q235 |
| 9 | Square head screw spike | 22x145, 22x155, 22x165 | Q235A |
| 10 | Hexagon screw spike | 22x145, 22x155, 22x165, 22x185, 22x195 | Q235A |
| 11 | Dog Spike | 16×165 | ? |
| 12 | Gauge apron | 10#, 13#, 14#, 20# | Q235 |
| 13 | Antiseptic gauge apron | 10# | Q235 |
| 14 | Steel Tie plate/base plate | QT450-10 | |
| 15 | Rail anchor | QT450-10, Q235A, QT400-15 | |
| 16 | Rubber tie plate | P43, P50, P60 | Rubber |
| 17 | Elastic rail clip | A,B Type | 60Si2Mn |
| 18 | SKL serious Type | 60Si2Cr, 38Si7 | |
| 19 | G Type | 60Si2MnA | |
| 20 | W Type | ||
| 21 | Antiseptic elastic rail clip | B Type | 60Si2MnA |
| 22 | Nylon apron block | V type, 0-4#, 2-6# | polyamide 66 |
| 23 | Insulated Rail Gauge Rod | ¢32, ¢36 | ? |
| 24 | Rail Gauge Rod | ¢32, ¢36 | ? |
| 25 | Fish plate | 43kg, 50kg, 60kg, 75kg | B7. 45# |
| BS60, BS75R, BS80A, BS90A | B6, B7 | ||
| Insulated fish plate (43, 50, 60, 75).. | B6, B7 | ||
| UIC60, UIC54 | 50#, 45# |
Screw Spike
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.

| Type | Ss5, Ss 8, Ss25, Ss36, UIC864-1 Series, etc |
| Raw material | Q235, 35 steel, 45steel, 40Mn2, 20 Mn Si |
| Grade | 4.6, 4.8, 5.6, 8.8 |
| Surface | plain(oiled), black paint, color paint, zinc, HDG, etc |
Dog Spike
A dog spike, also called cut track spike, is often used to fasten T-shaped railway track to wooden sleepers, to secure a rail and tie plate to the ties in track, which has a pointed penetrating head with square shank, and the underside of the spike head is sloped to compromise the top of the rail base.

| Specification | Material | Surface | Standard |
| 5/8*6 '' | A3,Q235, 45#,55#, etc | According to customer needs. | According to customer's drawings or samples. |
| 9/16*5-1/2 '' | |||
| 3/8''*3-1/2 '' | |||
| 1/2*3-1/2 | |||
| Other kinds |
Rail anchor
Rail anchors made in one-piece construction from spring steel are designed to fasten the steel rail tight on the base of the rail to prevent the rail from longitudinal movements, i.e. the " creeping" of the rail, caused by changing temperature, grades, traffic patterns, and braking action of trains.


Rail Gauge Rod
Rail gauge rod, also named gauge tie rod or gauge tie bar, is a member bar which is specially designed to joint two steel rails at the rail bottom to protect the rails from tilting and keep the rails in certain rail gauge.







