Products Made in Japan

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