コヤウチファスナー List of Products and Services

We handle "anchor pins" that are manufactured using rolling processing for all tip shapes, and both types with and without heads are available. These are core rods made of iron and stainless steel, designed to fix concrete to objects, with a bullet-shaped tip. We have manufacturing experience for diameters ranging from M6 to M16 and lengths from 45 to 180, using materials such as iron and stainless steel. 【Features】 ■ All tip shapes are produced using rolling processing ■ Both types with and without heads can be manufactured ■ Fixes concrete to objects ■ Made of iron and stainless steel ■ Supports diameters from M6 to M16 and lengths from 45 to 180 *For more details, please download the PDF or feel free to contact us.

• Other consumables

We would like to introduce the "core rods and nails" that we handle. These have a shape with a bamboo shoot-like single-edged screw that serves as the core rod for resin anchors. During installation, a hammer is used for work, and during removal, the screw can be detached by rotating it with a screwdriver. We have manufacturing achievements in sizes ranging from Φ2.2 to Φ4 in diameter and lengths from 30 to 59 mm, with materials including iron and stainless steel. 【Features】 ■ Shape with a bamboo shoot-like single-edged screw ■ Hammer used for installation ■ Screw can be detached with a screwdriver during removal ■ Available in diameters from Φ2.2 to Φ4 and lengths from 30 to 59 mm ■ Manufacturing achievements in iron and stainless steel *For more details, please download the PDF or feel free to contact us.

• Other consumables

We handle "Thread Rolling Screws (Tap Tight)" that can be fastened by directly screwing into a pilot hole that has not been processed with female threads. Some of these screws are compatible with small screws, and they are characterized by a rice ball-shaped cross-section, which provides a locking function to prevent loosening. Additionally, we offer S type, C type, B type, and P type, and we handle a wide range of long products. 【Features】 ■ Has a locking function to prevent loosening ■ Some products are compatible with small screws ■ Screw cross-section is rice ball-shaped (triangular) ■ We handle a large number of long products *For more details, please download the PDF or feel free to contact us.

• Other consumables

We would like to introduce the "special screws, rivets, and pins" that we handle. Our company has accumulated a variety of processing technologies, including cross-recessed screws, wood screws with distinctive features in the head and screw shaft, flange-formed pins produced by rolling processing, pins with R-shaped ends, and stop screws with cross-recessed ends. Please feel free to contact us if you have any requests. 【Examples of Processing Technologies】 ■ Cross-recessed stop screws, wood screws with distinctive features in the head and screw shaft ■ Flange-formed pins produced by rolling processing ■ Pins with R-shaped ends ■ Stop screws with cross-recessed ends *For more details, please download the PDF or feel free to contact us.

• Other consumables

We handle "washer-integrated screws (Semus)" that incorporate flat washers or spring washers under the heads of small screws. Our automatic assembly machine is dedicated to long lengths, allowing for a head shape of M4 and M5, with lengths ranging from 54 to 160 mm. We have a proven track record of manufacturing in various materials, including iron and stainless steel. 【Features】 ■ Head shapes of M4 and M5 ■ Lengths can be processed from 54 to 160 mm ■ Proven manufacturing in various materials, including iron and stainless steel ■ Washers do not come off after integration due to rolling ■ Significantly improves work efficiency *For more details, please download the PDF or feel free to contact us.

• Other consumables

We handle "grinding stone shafts," which are the core rods used for grinding and polishing in medical and industrial applications. We have established manufacturing know-how through cold forging and rolling processes, enabling mass production of high-quality products with maintained shaft straightness. Shapes include straight, with head, with taper, and stepped, and we have manufacturing experience with materials such as iron and stainless steel (SUS430). [Examples of Shapes] ■ Straight ■ With Head ■ With Taper ■ Stepped *For more details, please download the PDF or feel free to contact us.

• Other consumables

The "hollow rivet" is a product that can be fixed semi-permanently by creating a hole diameter smaller than the shaft diameter at the tip and deforming the head shape and tip. The dimensions are stable due to hole drilling by cold forging, and the end faces are neatly aligned. The thickness can be processed from Φ2 to Φ6, and the length can be processed from 8 to 150 mm. We can manufacture difficult-to-obtain sizes such as elongated and short thick items, and we have a track record of producing materials such as iron, various types of stainless steel, brass, and aluminum. 【Features】 ■ Stable dimensions due to hole drilling by cold forging ■ Thickness can be processed from Φ2 to Φ6 ■ Length can be processed from 8 to 150 mm ■ Capable of manufacturing difficult-to-obtain sizes ■ Proven track record of producing materials such as iron, various types of stainless steel, brass, and aluminum *For more details, please download the PDF or feel free to contact us.

• Other consumables

Our company offers "concrete screws" designed to fasten components to concrete and similar materials. These screws feature a cutting edge on the threads, allowing them to be directly screwed into a pre-drilled hole, enabling them to cut and fasten simultaneously. Additionally, they have a special thread shape known as "high-low," which has a significant difference between the peaks and valleys, ensuring a strong grip in concrete. We have proven performance in sizes of 4mm, 5mm, and 6mm. 【Features】 ■ Threads with cutting edges ■ Made from iron and stainless steel ■ Hardened for maintained strength ■ Special thread shape with a significant difference between peaks and valleys, known as high-low ■ Proven performance in sizes of 4mm, 5mm, and 6mm *For more details, please download the PDF or feel free to contact us.

• Other consumables

We handle a wide range of "small screws" that can be processed in sizes from M2 to M12 and lengths from 2 to 180mm. Without being limited to standards, we freely combine head shapes, drive types, anti-loosening features, and tip shapes to propose suitable shapes for our customers. We can also manufacture unusual sizes that are typically difficult to obtain, such as elongated and thick short items, with a proven track record in various materials including iron, stainless steel, brass, aluminum, and titanium. 【Features】 ■ A wide range of options available ■ Processable sizes from M2 to M12 and lengths from 2 to 180mm ■ Compatible with overseas standards such as ANSI, DIN, and BS ■ Abundant stock of gauges and molds ■ Capable of producing unusual sizes that are typically hard to obtain *For more details, please download the PDF or feel free to contact us.

• Other consumables

We handle "tapping screws" made of various materials including iron, stainless steel, brass, aluminum, and titanium, with a proven track record in manufacturing. These screws can be directly fastened to components even if they do not have internal threads. There are four types of iron tapping screws: Type 1, Type 2, Type 3, and Type 4. Additionally, we can combine two-thread screws, coarse screws, and special-shaped screws to meet customer needs, and our screws provide a different user experience. **Features of Iron Tapping Screws** - Type 1: The coarsest pitch (the distance between screw threads). - Type 2: Finer pitch than Type 1, excellent workability for screwing in. - Type 3: Suitable for areas subject to vibration as they are less likely to loosen. - Type 4: Good screwing capability, convenient for locating holes in the counterpart, and combines the features of Types 1 and 2. *For more details, please download the PDF or feel free to contact us.*

• Other consumables

Our company handles "wood screws" that are finished to a stable quality without any leading or extending. The screw features a pointed tip and has threads cut on the lower two-thirds of the shaft, eliminating the need for nuts or female threads. According to standards, there are two types of head recesses: one with a (+) cross hole and one with a (-) slotted hole, and three types of head shapes: flat head, round flat head, and round head. 【Features】 ■ Used for fastening wood ■ Pointed tip ■ Threads cut on the lower two-thirds of the shaft ■ No need for nuts or female threads ■ Three types of head shapes: flat head, round flat head, and round head *For more details, please download the PDF or feel free to contact us.

• Other consumables

We would like to introduce the main equipment of Koyauchi Fastener Co., Ltd., a specialized manufacturer of various precision screws and cold-forged parts. In the "Equipment Overview," we present machinery related to headers and trimmers, as well as machinery for secondary processing, inspection devices, and cleaning systems. 【Manufacturing Range】 ○ Diameter: Φ1.2 to 10mm ○ Length: Approximately 2 to 160mm ○ Materials: Carbon steel, alloy steel, brass, copper, aluminum, ○ Stainless steel (SUS304, XM7, 316, 410, 430, etc.) ○ Special processing: Washer assembly (sems), split ends, grooving, etc. For more details, please contact us or download the catalog.

• bolt
• nut
• Other machine elements

The products of Koyauchi Fasteners Co., Ltd. are used in various industries and fields that form the foundation of daily life, including construction, civil engineering, automotive, electrical, industrial machinery, toys, medical devices, railway vehicles, and agricultural machinery. In particular, our "non-standard sizes," which are thick and short or thin and long, are highly appreciated by many customers. We aim to contribute even more to the industries and fields that support our daily lives through product development that meets customer needs, in addition to our existing product lineup. 【Business Description】 ○ Manufacturing and processing of screws, screw-attached parts, industrial parts, etc. For more details, please contact us or download the catalog.

• bolt
• nut
• Other machine elements