トープラ List of Products and Services

The "Robutite P type" is a tapping screw for resin. The screw thread is set at a 45° angle to prevent resin cracking, and multiple concave shapes are provided on the outer circumference of the screw thread to enhance the loosening function. Due to the special thread angle and shape, it can be applied not only to resin but also to steel plates. 【Features】 ■ Special thread angle and shape ■ Applicable to both resin and steel plates ■ Enhanced loosening function *For more details, please refer to the catalog or feel free to contact us.

• nut

The "Product Comprehensive Guide" is a general catalog of Topura Co., Ltd., which manufactures and sells small screws, tapping screws, and bolts. It features various screws and bolts, including the "HTB Bolt," which incorporates a tapping function to reduce the total cost of bolt tightening, as well as "Torsev" and "Access Point." We introduce a diverse product lineup that can fully meet the increasingly diversified and advanced needs of our customers. [Contents] ■ HTB Bolt ■ Torsev ■ Access Point ■ W-shaped Trowatite ■ Loctite S-type, etc. *For more details, please refer to the catalog or feel free to contact us.

• Other machine elements
• bolt

The "Earth Bolt" is a multifunctional screw that has a coating removal function at the tip and an earthing function in the threaded section. It features a locking section in the threaded part that provides two functions: electrical conductivity (earthing) with the female thread and resistance to loosening, while also reducing the screwing torque and improving workability. Please use it for fastening areas that require earthing. 【Features】 ■ Multifunctional screw ■ Ensures stable earthing function *For more details, please refer to the catalog or feel free to contact us.

• bolt

This product uses pure titanium and alloy titanium to supply racing bolts and racing parts. It has high corrosion resistance and is lightweight. Please use it for fastening parts where weight reduction is required, such as racing components. 【Features】 ■Specialized for weight reduction ■High corrosion resistance *For more details, please refer to the catalog or feel free to contact us.

• bolt

Aluminum bolts do not experience galvanic corrosion against aluminum, and since their specific gravity is 1/3 compared to steel, they are highly effective for weight reduction. The material specification is from the 7000 series, with a strength of 4T, and by applying anodizing treatment, high corrosion resistance and decorative qualities (various color variations) can be achieved. 【Features】 ■ No galvanic corrosion against aluminum ■ Significant weight reduction effect ■ High corrosion resistance and decorative qualities can be achieved through anodizing treatment *For more details, please refer to the catalog or feel free to contact us.

• bolt

The "HCR Bolt (High Tensile Corrosion Resistance Bolt)" is an austenitic stainless steel bolt that combines high strength and high corrosion resistance. It achieves a strength level of 8.8 to 12.9 and corrosion resistance greater than SUS304, making it suitable for use in harsh corrosive environments and allowing for cost reduction through size reduction. 【Features】 ■ High strength ■ High corrosion resistance ■ Usable in harsh corrosive environments ■ Cost reduction through size reduction *For more details, please refer to the catalog or feel free to contact us.

• bolt

The "Twin Tight" is a bolt designed with special thread profiles to enhance fatigue strength and resistance to loosening. By changing the thread angle from the standard 60 degrees to a two-stage thread angle, the special thread is elastically deformed under tightening axial force, resulting in a more uniform load distribution on the threads that engage with the nut, thereby improving resistance to loosening. 【Features】 ■ Fatigue strength ■ Improved resistance to loosening *For more details, please refer to the catalog or feel free to contact us.

• bolt

The "Robutite P type" is a tapping screw for resin. The screw thread profile is set at a 45° angle to prevent resin cracking, and multiple concave shapes are provided on the outer circumference of the screw thread to enhance loosening functionality. Due to the special thread angle and shape, it can be applied not only to resin but also to steel plates. 【Features】 ■ Special thread angle and shape ■ Applicable to both resin and steel plates ■ Enhanced loosening functionality *For more details, please refer to the catalog or feel free to contact us.

• bolt

The "Access Point" is a bolt that has received high praise for its exceptional ability to prevent thread seizing and galling caused by diagonal tightening of bolts and nuts. The guide thread at the tip of the screw prevents biting caused by the tilt and pitch misalignment of the bolt and nut, improving the workability of the fastening process. 【Features】 ■ Ideal for preventing thread seizing and galling due to diagonal tightening of bolts and nuts ■ Improved workability of fastening ■ Prevents galling *For more details, please refer to the catalog or feel free to contact us.

• bolt

"Toruseve" is a water-soluble friction coefficient stabilizer that reduces the variation in friction coefficients and contributes to improved fastening reliability. With a low and stable friction coefficient, appropriate axial force corresponding to bolt strength can be secured. Furthermore, downsizing is also possible through the effective utilization of bolt strength. 【Features】 ■ Reduces variation in friction coefficients ■ Contributes to improved fastening reliability ■ Secures appropriate axial force corresponding to bolt strength ■ Downsizing is possible through effective utilization of bolt strength *For more details, please refer to the catalog or feel free to contact us.

• bolt

The "HTB (High Tapping Bolt)" is a tapping bolt designed with a tapping function for high-strength bolts, aimed at reducing the total cost up to the bolt tightening stage. It can be directly fastened into the blind holes of aluminum die-cast and zinc die-cast components, and it is also possible to fasten without changing the tightening torque of the current line. 【Features】 ■ A product designed to reduce the total cost up to bolt tightening ■ Can be directly screwed into the blind holes of aluminum and zinc die-cast ■ Can be fastened without changing the tightening torque of the current line *For more details, please refer to the catalog or feel free to contact us.

• bolt

This is an introduction to the "General Catalog of Small Screws, Tapping, and Bolt Products" handled by Topura Corporation. Topura's various products can fully meet the diverse and advanced needs of our customers.

• nut
• Other Auto Parts

The tapping process for aluminum and zinc components can be eliminated, resulting in cost reduction.

• Other machine elements

The necessity of high-strength bolts Size reduction due to increased strength → Lightweighting of fastening points contributing to improved fuel efficiency in automobiles Prevention of loosening due to increased fastening force → Improved fastening reliability Overcoming challenges related to high-strength bolts

• Other machine elements

It is a water-soluble friction coefficient stabilizer that reduces the variation of the friction coefficient and stabilizes it, achieving improved work efficiency and reduced costs, without containing harmful substances.

• Other machine elements

The tightening characteristics are equivalent to those of the conventional hexavalent chromium zinc-aluminum composite coating. Since the friction coefficient is comparable to that of the conventional hexavalent chromium zinc-aluminum composite coating treatment, there is no need to change the tightening torque.

• Other machine elements

Standardizing stricter management than hexavalent to stabilize performance Introduction of automatic reagent pH replenishment system Regular checks of necessary elements and impurity concentrations

• Other machine elements