KOYAMA CO., LTD. Product Lineup

"Lockfill" is our original coating screw designed to prevent loosening, which fuses "12 nylon resin" known for its excellent elasticity, resilience, abrasion resistance, and oil resistance into the valleys of the screw. It is reusable and has a long shelf life, making it very user-friendly. 【Features】 ■ Water-soluble and environmentally friendly ■ Can be applied around the entire screw ■ Long shelf life (semi-permanent) ■ Ideal for areas that need to be reused ■ Excellent elasticity, resilience, abrasion resistance, and oil resistance ■ Perfect for areas where adhesive-type (glue) solutions are unsatisfactory ■ Usable range: -50℃ to 140℃ *For more details, please refer to the catalog. For inquiries, please contact Koyama Co., Ltd.

"LOCTITE Pre-coated Type" This product from Tokai Lock Co., Ltd. features anaerobic adhesives from Henkel's Loctite brand, which are pre-coated onto screws with consideration for people and the planet. The adhesive is transformed into a plastic film, integrating the screw and adhesive. When the screw is tightened, the plastic film tears, and air is blocked at the screw's mating surface, causing the adhesive to harden, providing locking and sealing effects. 【Features】 ■ Excellent locking effect ■ Smooth tightening operation ■ Economical and environmentally friendly 【Characteristics】 ■ Water-soluble and environmentally friendly ■ Excellent elasticity, recovery, wear resistance, and oil resistance ■ Reusable ■ Long shelf life *For more details, please refer to the catalog or contact Koyama Co., Ltd.

We would like to introduce the "fastening components" that we handle. We offer standard and custom products tailored to various industrial applications, including automotive parts, medical devices, nuclear, home appliances, and welfare equipment. Additionally, we are committed to proposing fastening technologies, including value analysis (VA). Please feel free to contact us when you need assistance. 【Product Lineup】 ■ Screws ■ Bolts ■ Washers ■ Nuts ■ Rivets ■ Plastic Fasteners *For more details, please download the PDF or feel free to contact us.

● Does not come out ● Good torque transmission rate ● Good adhesion with bits ● Excellent bit durability ● Can be used with commercially available cross bits (*There are also dedicated tools to enhance effectiveness) *For more details, please refer to the catalog. For inquiries, please contact Koyama Co., Ltd.

We would like to introduce the "Nabe small screws" that we handle. We offer a wide range of screw sizes, including M2, M2.3, M2.5, M2.6, M3, M3.5, M4, and M5. We have a variety of materials available, such as iron, brass, stainless steel, and SUS316L. 【Partial Lineup】 ■M2 ■M2.3 ■M2.5 ■M2.6 ■M3 *For more details, please feel free to contact us.

We would like to introduce the "pan head screws" that we handle. The materials include iron, brass, stainless steel, aluminum, and titanium, among others. Additionally, we offer screw sizes ranging from M2 to M12. Please feel free to contact us if you have any requests. 【Partial lineup】 ■M2 ■M2.3 ■M2.5 ■M2.6 ■M3 *For more details, please feel free to contact us.

We would like to introduce the "round plate small screws" that we handle. We offer materials such as iron, brass, stainless steel, and SUS316L. We have a lineup ranging from M2 to M8. Please feel free to contact us if you have any requests. 【Partial lineup】 ■M2 ■M2.3 ■M2.5 ■M2.6 ■M3 *For more details, please feel free to contact us.

We would like to introduce the "truss screws" that we handle. We offer pitches ranging from 0.4 to 1.5 and tolerances of ±0.1 to ±0.4, among others. Materials available include iron, brass, stainless steel, SUS316L, and SUS430. Please feel free to contact us if you have any requests. 【Lineup (partial)】 ■M2 ■M2.3 ■M2.5 ■M2.6 ■M3 *For more details, please feel free to contact us.

We would like to introduce the "Bind Screws" that we handle. The materials available are iron, brass, stainless steel, SUS316L, SUS430, and titanium. The cross hole depths range from a maximum of 1.01 to 4.36 and a minimum of 0.65 to 3.78. Please feel free to contact us if you have any requests. 【Product Lineup (Partial)】 ■M2 ■M2.3 ■M2.5 ■M2.6 ■M3 *For more details, please feel free to contact us.

We would like to introduce the "round small screws" that we handle. The materials are iron, brass, and stainless steel. We offer screw sizes from M4 to M16. Additionally, we have JIS round small screws, round small screws (Whit), and brass JIS round small screws. Please feel free to contact us if you have any requests. 【Product Lineup (Partial)】 ■ Round small screws - M4, M6, M8, M10, M12, M16 ■ JIS round small screws - M3, M4, M5 ■ Round small screws (Whit) - W1/8, W5/32, W3/16, W1/4, W5/16, W3/8, W1/2 *For more details, please feel free to contact us.

We would like to introduce the "flat head screws" that we handle. We offer a lineup of sizes: M1.0, M1.2, M1.4, M1.6, M2.0, M2.6, M3.0, M4.0, M5.0, M6.0, and M8.0. The materials available are iron, brass, and stainless steel. Please feel free to contact us if you have any requests. 【Partial Lineup】 ■M1.0 ■M1.2 ■M1.4 ■M1.6 ■M2.0 ■M2.6 *For more details, please feel free to contact us.

We would like to introduce our "Upset Screws (Hex Head)" that we handle. The materials are iron, brass, and stainless steel. The screw sizes available are M3, M3.5, M4, M5, M6, M8, M10, and others. Please feel free to contact us if you have any requests. 【Product Lineup (Partial)】 ■M3 ■M3.5 ■M4 ■M5 ■M6 *For more details, please feel free to contact us.

We would like to introduce the "Slim Head Screws" that we handle. The materials used are iron and stainless steel. The screw sizes available are M2, M2.6, M3, M4, M5, and M6. Please feel free to contact us if you have any requests. 【Product Lineup】 ■M2 ■M2.6 ■M3 ■M4 ■M5 ■M6 *For more details, please feel free to contact us.

In the automotive assembly industry, work that balances quality and efficiency is required. In particular, cam-out during screw tightening can lead to damage to the workpiece and loss of working time, potentially resulting in decreased productivity. Quastix addresses these challenges by suppressing cam-out and enhancing torque transmission efficiency. [Usage Scenarios] - Assembly of automotive bodies - Installation of interior parts - Assembly around the engine [Effects of Implementation] - Prevention of workpiece damage due to cam-out - Reduction of working time - Increased lifespan of bits - Improvement in assembly quality

Quostics are screws that can be used with the drivers you currently have. They can reduce troubles related to screw tightening in assembly line work. 【Benefits of Implementation】 - Prevents issues that could damage external parts or circuit boards due to stripped screws. - Provides good grip even with low-profile screws, contributing to space-saving and improved design aesthetics.

Quastix looks similar to a standard cross-recessed screw, but it has a mechanism that makes it difficult to cam out. Standard cross bits can also be used. Cam out during screw tightening can lead to wasted work time and potential damage to materials. Quastix addresses these issues by suppressing cam out, contributing to improved work efficiency. [Usage Scenarios] - Assembly of wooden furniture - Assembly of metal furniture - Mass production in factories [Benefits of Implementation] - Prevention of damage to materials due to cam out - Prevention of cross-recess collapse (ream out) - Reduction of work time - Reduction of worker burden

【Effects of Introduction】 - Reduced risk of component damage due to cam-out - Improved work efficiency - Difficult to cam-out even with a low head, contributing to space-saving of components 【Usage Scenarios】 - Assembly of small electronic devices - Screw tightening work for precision instruments - Circuit board mounting

By adopting Quostics, work efficiency increases, leading to improved productivity. 【Usage Scenarios and Effects of Implementation】 - Reduces the risk of accidents due to cam-out - Applicable to tapping screws under torque - Streamlines assembly work - Achieves space-saving by enabling low-profile screws.

We would like to introduce the "hex bolts" that we handle. We offer thread sizes from M3 to M42. The materials available include iron, SNB7, brass, stainless steel, SUS316, SUS310S, and aluminum. Please feel free to contact us if you have any requests. 【Thread sizes (partial)】 ■M3 ■M4 ■M5 ■M6 ■M8 *For more details, please feel free to contact us.

We would like to introduce the "Hex Bolts (Partially Threaded)" that we handle. The materials available are iron, SNB7, brass, stainless steel, SUS316, SUS316L, SUS310S, aluminum, and titanium. We offer a range of thread sizes from M3 to M80. Please feel free to contact us if you have any requests. 【Thread Sizes (Partial)】 ■M3 ■M4 ■M5 ■M6 ■M8 *For more details, please feel free to contact us.

We would like to introduce the "Hex Socket Bolts" that we handle. The screw sizes range from M1.4 to M42. The materials available include iron, stainless steel, SUS316L, SUS310S, SUS430, aluminum, titanium, and 64 titanium. Please feel free to contact us if you have any requests. 【Screw Sizes (Partial)】 ■M1.4 ■M1.6 ■M2.5 (M2.6) ■M3 ■M4 *For more details, please feel free to contact us.

We would like to introduce our "Hexagon Socket Set Screw (Hollow End)." The materials available include iron, stainless steel, SUS316L, and titanium. We offer screw sizes ranging from M1.2 to M24. Please feel free to contact us if you have any requests. 【Screw Sizes (Partial)】 ■M1.2 ■M1.6 (1.7) ■M2 ■M2.5 (2.6) ■M3 *For more details, please feel free to contact us.

We would like to introduce our "Hexagon Socket Set Screw (Hollow Set) <Flat Tip>." We offer screw sizes ranging from M1.6 to M24. The materials available include iron, stainless steel, and SUS316L. Please feel free to contact us if you have any requests. 【Screw Sizes (Partial)】 ■M1.6 ■M2 ■M2.5 (2.6) ■M3 ■M4 *For more details, please feel free to contact us.

We would like to introduce our "Hex Socket Set Screw (With Pointed End)." We offer materials such as iron, stainless steel, and SUS316L. The screw sizes range from M1.6 to M16. Please feel free to contact us if you have any requests. 【Screw Sizes (Partial)】 ■M1.6 ■M2 ■M2.5 (2.6) ■M3 ■M4 *For more details, please feel free to contact us.

We would like to introduce our "Hex Socket Set Screws (Hollow Set) <Rod End>." The materials include iron in finishes such as raw, zinc-plated, chromated, and nickel, as well as stainless steel. We offer screw sizes ranging from M1.6 to M20. Please feel free to contact us if you have any requests. 【Screw Sizes (Partial)】 ■M1.6 ■M2 ■M2.5 (2.6) ■M3 ■M4 ■M5 *For more details, please feel free to contact us.

We would like to introduce the "round washers" that we handle. We offer a wide range of products including ISO, ISO small size, JIS, JIS small size, brass round washers, standard round washers, and standard round washers made of iron. When the counterpart material is wood, using larger diameter round washers for wood can prevent sinking. 【Product lineup (partial)】 ■ Round washer ISO ■ Round washer ISO small size ■ Round washer JIS ■ Round washer JIS small size ■ Brass round washer standard *For more details, please feel free to contact us.

It is suitable for harsh usage conditions such as precision machinery, marine and chemical fields, and ultra-low temperature environments. Its specific gravity is 4.51, achieving about 60% of the weight of iron. In addition to preventing magnetic interference due to its complete non-magnetic properties, it exhibits excellent corrosion resistance that surpasses stainless steel due to its strong oxidized surface, making it resistant to seawater and chemicals. 【Convenience of Procurement】 During the prototype and verification stages, arrangements can be made immediately from just one piece. When transitioning to mass production, we utilize our unique procurement routes as a specialty screw trading company to efficiently source equivalent products that meet design specifications. We aim to optimize costs and delivery times.

The "NW-KF IWFV-1000" is a flexible hose available in nominal diameters ranging from NW-16 to NW-100. It boasts high quality, having passed a leak test with a standard of He gas leak rate below 1.0×10^-9 Pa·m³/sec. Changes in bellows material and flange material are also possible, allowing us to meet various customer needs. 【Features】 ■ Blades can also be manufactured ■ Nominal diameter NW-10 can also be produced ■ Nominal diameters of NW-125 and above can also be manufactured ■ Products with fluoropolymer coating on the inner surface are also available *For more details, please download the PDF or feel free to contact us.

The "Pipe End IWFV-2000" is a flexible hose lineup available in nominal diameters from 1/4B to 1/2B. It is a product that has passed a stringent leak test with a He gas leak rate of 1.0×10^-9 Pa·m³/sec or lower. It can flexibly accommodate changes in the materials of bellows and flanges, allowing for specifications tailored to your application. 【Features】 ■ Blades can also be manufactured ■ Nominal diameters of 3/4B and above can also be produced ■ Products with a fluorine-based resin coating on the inner surface are also available *For more details, please download the PDF or feel free to contact us.

The "VG-VF IWVF3000" is a flexible hose available in sizes ranging from 20A to 300A. The standard specification features fixed flanges on both ends. It is also possible to manufacture VF flanges or VG flanges on both sides. We can accommodate changes in the materials of the bellows and flanges, allowing us to provide specifications tailored to your needs. 【Features】 ■ Blades can also be manufactured ■ Flexibility varies depending on the type of tube ■ Products with a fluorine resin coating on the inner surface are also available *For more details, please download the PDF or feel free to contact us.

The "VG-VF Loose IWVF-4000" is a flexible hose available in sizes ranging from 20A to 300A. The standard specification features a loose type flange on the VF side and a fixed type flange on the VG side. It is also possible to manufacture both sides as loose type or both sides with VF flanges. Additionally, VG flanges can be produced. 【Features】 ■ Bladed versions can also be manufactured ■ Flexibility varies depending on the type of tube ■ Products with a fluoropolymer coating on the inner surface are also available *For more details, please download the PDF or feel free to contact us.

The "NW-KF IWVC-1000" is a molded bellows available in sizes from NW-16 to NW-100. As a standard specification, it is a product that has passed a test for He gas leakage of 1.0×10^-9 Pa·m³/sec or less. The materials for the bellows and flanges, as well as the thickness of the bellows, can be changed, allowing you to choose according to your application. 【Features】 ■ NW-10 size can also be manufactured ■ Sizes of NW-125 and above can also be manufactured ■ Products with an inner fluoropolymer coating are also available *For more details, please download the PDF or feel free to contact us.

The "Pipe End IWVC-2000" is a molded bellows available in sizes ranging from 3/4B to 4B. It can be used in environments where the inside is under vacuum and the outside is atmospheric pressure, and it meets the stringent standard of a He gas leak rate of 1.0×10^-9 Pa·m3/sec or lower. In addition to accommodating changes in bellows material and pipe material, we also inquire about the spring constant and thickness of the bellows. 【Features】 ■ Custom manufacturing is possible for sizes below 1/2B ■ Custom manufacturing is possible for sizes above 5B ■ Changes to the outer diameter and thickness of the pipe are also possible ■ Products with an inner fluoropolymer coating are also available *For more details, please download the PDF or feel free to contact us.

The "ICF IWVC-3000" is a molded bellows that offers a lineup from nominal diameter ICF34 to ICF253. The standard type features a fixed flange, but depending on the application, it can be modified to have tapped bolt holes or can be manufactured as a rotating type. Additionally, there is a custom type available where the bellows is directly welded to the inside of the flange, allowing for selection based on various customer applications. 【Features】 ■ Standard type has a fixed flange ■ Bolt holes can be changed to tapped holes ■ Rotating type can also be manufactured ■ Custom type has different bellows dimensions ■ Products with a fluoropolymer coating on the inner surface are also available *For more details, please download the PDF or feel free to contact us.

The "VG-VF IWVC-4000" is a molded bellows available in sizes ranging from 20A to 300A. In addition to the VG-VG and VF-VF types, flanges can also be manufactured in a rotating type (loose type). Furthermore, in addition to the standard type where the bellows is directly welded to the flange, we also offer a custom type where the bellows is directly welded to the inside of the flange, allowing for selection based on various customer applications. 【Features】 ■ VG-VG and VF-VF types can also be manufactured ■ Sizes of 350A and above can also be produced ■ Rotating type (loose type) flanges can also be manufactured ■ Products with fluoropolymer resin coating on the inner surface are also available *For more details, please download the PDF or feel free to contact us.

The "ISO-MF IWVC-5000" is a molded bellows available in sizes ranging from MF-63 to MF-200. It can be used in environments where the inside is under vacuum and the outside is at atmospheric pressure, meeting the stringent standard of a helium gas leak rate of 1.0×10^-9 Pa·m3/sec or lower. It supports changes in bellows material and flange material, and modifications to the spring constant and thickness of the bellows are also possible. 【Features】 ■ Dimensions of the bellows can be changed ■ Fluoropolymer coating products are also available for the inner surface *For more details, please download the PDF or feel free to contact us.

The "ISO-BT IWVC-6000" is a molded bellows lineup ranging from a nominal diameter of BT-63 to BT-200. As a standard specification, it is a product that has passed a test for He gas leakage of 1.0×10^-9 Pa·m³/sec or less. The materials of the bellows and flanges, as well as the thickness of the bellows, can be changed, allowing you to choose according to your application. 【Features】 ■ The dimensions of the bellows can be changed. ■ Products with a fluorine-based resin coating on the inner surface are also available. *For more details, please download the PDF or feel free to contact us.

This document is a product catalog for molded bellows and vacuum flexible hoses that comply with various standards. It features a wide range of products tailored to different applications, including NW-KF, VG-VF, pipe ends, and ICF. Detailed descriptions of each product's standard specifications, structure, and dimensional tables are provided with illustrations, so please take a moment to read through it. [Contents (partial)] ■ NW-KF Flexible Hose ■ VG-VF Flexible Hose ■ VG-VF Loose Flexible Hose ■ Pipe End Flexible Hose ■ Pipe End Metal Seal Flexible Hose ■ NW-KF Molded Bellows *For more details, please download the PDF or feel free to contact us.

A new hexagon socket bolt boasting high strength of "14.9," surpassing the highest JIS strength classification of "12.9," has arrived!! It utilizes high-strength steel with excellent "delayed fracture characteristics," achieving a tensile strength of 1,400 N/mm² while maintaining over 9% elongation!! The adoption of MJ threads (aerospace metric threads) also improves fatigue resistance, and this "super strength" solves issues in maintenance!! Additionally, separately from the above, there is a Delta Protect Coat, an environmentally friendly, chrome-free (no hexavalent or trivalent chromium) non-electrolytic thin film zinc flake coating, which, when applied, enables fastening with ultra-high strength and high corrosion resistance! Please consider this in conjunction!

PVC (vinyl) protective caps. Can be used to prevent scratches, rust, dust, and injuries on bolts, nuts, and screws. Compliant with RoHS2 (10 substances). Designed to be difficult to fall off due to high dimensional accuracy. Available in a wide range of sizes. 【Lineup】 Compatible standards ■M6 ■M8 ■M10 ■M12 ■M16 ■M20 *For more details, please refer to the catalog or contact Koyama Co., Ltd.

Koyama Co., Ltd. is a specialized trading company that handles a wide range of industrial materials, including screws, cold-formed parts, springs, and pressed parts. We offer a diverse array of products such as fastening components, various metal processed products, and resin cutting and molding products. Additionally, we also provide our original product, the "Screw Tightening Reminder Counter." 【Business Activities】 ■ Screws, cold-formed parts, springs and pressed parts, precision machined parts, adhesives, sealants, machine tools, labor-saving equipment, design and development of AGVs and peripheral equipment, precision molded products, static electricity countermeasures, development and sales of environmental improvement products, electronic components, connectors, wire and harness processing. *For more details, please refer to our catalog or contact Koyama Co., Ltd.

The "HSA" is a high-performance wedge anchor made of carbon steel (with a zinc-plated finish) designed to securely and firmly fix robot system base frames and industrial automation equipment to concrete (without cracks). It features a "follow-up expansion function" that opens the expansion part in response to tensile force, providing stable strength against vibrations during operation. Our company has a proven track record of continuously supplying this product to major elevator manufacturers, and we can offer a "specially discounted price" that is unmatched by other companies, ranging from small lot procurement to large bulk deliveries.

1. Lightweight: It has a small specific gravity and is about 1/5 to 1/6 lighter than metal screws. 2. Insulation: It has high electrical resistance and excellent insulating properties. 3. Non-magnetic: It does not acquire magnetic properties. 4. Corrosion resistance: It has excellent corrosion resistance, with no worries about rust or corrosion. 5. Thermal insulation: It has a lower conductivity compared to metal screws and excellent thermal insulation properties.