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.

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.

"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.