サンエイ List of Products and Services

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that cannot be obtained commercially, please feel free to consult us. "Special clamp screws" are screws used for securing items such as clamps and vises. Metric screws and trapezoidal screws are used. We can accommodate shapes according to your application. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us. "Special Adjustable Bolts" are bolts used for height adjustment (adjustment bolts) and horizontal support in industrial and office equipment. We can accommodate custom orders. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us. "Special cover bolts" are bolts used for the installation of protective covers and inspection covers. We will manufacture them according to the size required. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult with us. "Special low-profile bolts" are effective when you want to minimize the protrusion of the screw head. They fit neatly in a compact space. We can accommodate sizes M8 and above. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us. "Special lead screws" are screws used in machine tools and positioning applications to move machine parts linearly. Trapezoidal screws are commonly used, and we can also accommodate two-start screws (multi-start screws). For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us. The "special hexagonal pillar" is used for joints, adjustments, and raising. By changing between internal and external threads, it can also be used as a size conversion joint. We can accommodate long screws that are difficult to obtain commercially, as well as high nuts with only internal threads. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us. "Special pipe screws" are used for connections in pipes and fluid machinery, and the pitch is finely specified for the strength of the joints. There are pipe parallel screws (G) intended for mechanical joining and pipe tapered screws (R) aimed at ensuring tightness. We also accommodate American National Pipe Thread (NPT) screws with a thread angle of 60 degrees. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that cannot be obtained commercially, please feel free to consult us. The "special air hole bolt" is used in vacuum devices when gas release is necessary, featuring a through hole to allow air to escape between the main body of the device and the screw. We can accommodate both additional processing of commercially available bolts and custom manufacturing. We can also produce long bolts. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us about anything. There are various types and methods for "screw locking," and Sun-Ei accommodates individual specifications as well. For more details, please contact us for consultation. For more information, please inquire or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us. The "special eccentric bolt" has an eccentric head and screw section, making it effective as a clamp due to the wedge action of the cam. We can accommodate requests for shapes that make it easier to grip the head. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us. "Special left-hand screws" are used in rotating bodies such as electric motors to prevent loosening when used in right-hand rotation applications. They are commonly used as fan blade fixing screws or motor shaft securing screws. Please consult us when considering production. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us. "Special inch screws" are screws measured in inches, with thread angles categorized as Unified screws (60°) and Whitworth screws (55°). Unified screws are further divided into coarse (UNC) and fine (UNF) threads based on pitch spacing. As they conform to international standards, they are commonly used in imported goods, plumbing fixtures, and construction-related applications. Please consult us when considering production. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us about anything. "Special anti-drop screws" are used in applications where doors need to be secured and repeatedly tightened or loosened. They do not fall off when loosened, making them convenient and preventing loss. We can accommodate both modifications to commercially available bolts and custom manufacturing. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us about anything. "Special plugs" are used as caps or spring retainers for piping, hydraulic equipment, and pneumatic equipment. They come in various shapes, including those with flanges or grooves for O-rings. We can accommodate your specifications regarding materials and heat treatment. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult us. "Special fine screws" are small screws with a nominal diameter of about 1 to 2 mm, used in electronic devices, precision machinery, and watches. We can manufacture from M1.0 and can accommodate specifications such as drilling holes in the center or machining the head. For more details, please contact us or refer to our catalog.

• bolt
• nut

At Sun-Ei Co., Ltd., we offer custom-made screws tailored to specific products and specifications for applications such as construction, machine tools, transportation machinery, industrial machinery, and chemical plants. If you have any special screws that are not available on the market, please feel free to consult with us. "Special Reamer Bolts" are used to fit into reamed holes for preventing misalignment and for positioning. We can accommodate the fit of the shaft according to the diameter of the reamer hole (bolt hole), so please consult with us. The head can also be customized to specifications such as hexagonal, round, hexagonal socket, and knurled. For more details, please contact us or refer to our catalog.

• bolt
• nut

San-Ei has established a diverse and small-lot production system for special screws, providing comprehensive support for equipment parts. 【Examples of Production】 ■Special Reamer Bolts These are used for fitting into reamed holes for preventing misalignment and for positioning. We can accommodate the fit of the shaft according to the reamed hole specifications, so please feel free to consult us. The head can also be customized to hexagonal, round, hexagonal hole, knurled, and other specifications. *For more details, please download the catalog or contact us.

• Processing Contract
• Contract manufacturing

San-Ei," a company based in Osaka that manufactures and sells special screws, offers a completely custom-made service that produces special screws according to specific products or specifications, such as screw parts not available on the market, long bolts, and bolts with internal threads. 【Processing Examples】 ■ Head shape processing (oval shape/knurled) ■ Hole processing in the head (hexagonal/hexalobular) ■ Eccentric processing ■ Head painting ■ Polishing ■ Welding ■ Through hole processing ■ Tapping 【Recommended for the following people!】 ◎ Those who need special screws that cannot be obtained commercially ◎ Those who require specific products or specifications for construction, machine tools, transport machinery, industrial machinery, chemical plants, etc. ◎ Cases where materials or surface treatments are needed according to environmental conditions, such as improving strength, corrosion resistance, and wear resistance. For more details, please download the catalog or contact us.

• Processing Contract
• Contract manufacturing

**Four Points of San-Ei** ○ One-stop service / Providing solutions to solve problems → Upon request, we will respond to your needs from drafting to material procurement, processing, surface treatment, joining, and assembly. ○ Trading company × Manufacturer functions / Responses tailored to a wide variety of situations → We handle joining processes and assembly in-house, accommodating various scenarios. ○ Short delivery times / Speedy delivery through numerous partner manufacturers → We work with over a hundred partner manufacturers, allowing us to respond immediately from prototypes to mass production. ○ Overseas research / Cost reduction with Japanese quality → By collaborating with our office in Vietnam, we assist in reducing costs while maintaining Japanese quality. For more details, please download the catalog or contact us.

• Processing Contract
• Contract manufacturing