Manufacturer: TEIKOKU SEIBYO

TEIKOKU manufactures various coating bolts to prevent electrolysis in subways and tunnels.
Resin such as polycarbonate and coating bolt of nylon 11 is good in ductility, toughness and impact resistance, it has low hygroscopicity and is extremely excellent in electric insulation resistance.

The company also produces bolts coated with nylon or epoxy coatings which offer stronger resistances.

Features

1. Products prevent electrolysis in the subway / tunnel.
2. They are good in ductility, toughness and impact resistance.
3. They have low hygroscopicity and are extremely excellent in electric insulation

Manufacturer: TEIKOKU SEIBYO

The concrete sleeper bolt is fastened to the rail through a spring in a sleeper that embeds a synthetic plug made of female thread in advance.

TEIKOKU creates screw thread of bolt by hot rolling rolling method. Therefore, unlike the cutting method, the fiber structure of the steel material is maintained without breaking. A wide range of usage can be considered for trapezoidal screws, such as bolts for concrete sleepers throughout the country, civil engineering, suspended parts of concrete walls in underground parts and so on.

Hot Rolling Method

1. Since the fiber structure is not broken, it is excellent in strength.
2. There is no eccentricity with high precision.
3. Suitable for mass production.
4. It also corresponds to customized items of any irregular / trapezoidal screws.
5. Screw processing of special steel and stainless steel possible

Manufacturer: TEIKOKU SEIBYO

TEIKOKU manufactures ordinary track bolt and heat treated fishplate bolts. Among them, heat-treated fishplate bolts produced three types of 5.6, 8.8, and 10.9. The company has received the JIS certification for the first time in the industry and have the industry’s best production volume with its excellent technology and management system.

JIS E 1107 (bolts / nuts related to railway joints) was enacted in February 1952. Since then, JIS E1107, E1113, E1114 have been integrated and advertised as New JIS E1107.

Specifications

Manufacturer: TEIKOKU SEIBYO

A more advanced fastening force is obtained for wood and synthetic sleepers, and screw spikes which is hard to loosen is widely used.
Our company offers screw kits with high precision and powerful threaded part by hot rolling method.
The purpose of use is the same as in the case of a rail spikes, please see the drawing table of rail fixing and tie plate. Synthetic sleepers are becoming popular and there are many cases where the diameter of the shaft diameter is smaller than that of the conventional type rail screwdriver, the diameter of the head is small, and the shape is changed depending on the place of use.

Manufacturer: TEIKOKU SEIBYO

Rail spikes production has been walking with the history of Japan’s long train.
Even now it is used for fastening of rails as wooden sleepers and synthetic sleepers and is highly regarded regardless of domestic and overseas.

Rail Spikes (Common) (JISE-1108)

It is the most commonly used ordinary rail spikes at present. The general use was enacted in 1967, and the improved type with the head thickened by 5 mm in 1974 was established for general purpose and N rail. After that, in 1986, a slip was applied to the head. What is currently used is what was decided as JIS in 1990 and it is for general purpose and for N rail.

Rail Spikes（Round Stopper Nail）

It is used for fastening a sleeper for N rail (using wit screw), a floor plate of expansion joint, and a sleeper type rate sleeve. Since the wit screw was switched to ISO screw (metric thread) from FY 1984, circles and maggots are used only for the repair of the branch unit using the wit screw which is currently laid, expansion joints.

Rail Spikes（Square Lock Nail）

Used for fastening sleeves of branch type for N rail (using metric thread) and floor plate branch type rate of expansion and contraction seams. The horns and mottles are designed considering the drawbacks of the following circles and motifs.

Specifications