Last Updated： Aggregation Period:Sep 17, 2025～Oct 14, 2025
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Sep 17, 2025～Oct 14, 2025
This ranking is based on the number of page views on our site.
Last Updated： Aggregation Period:Sep 17, 2025～Oct 14, 2025
This ranking is based on the number of page views on our site.
1～15 item / All 18 items
A screw that won't loosen! It's a bolt that won't come off the nut!
The "locking bolt" is a product of Iijima Manufacturing Co., Ltd., which manufactures parts for metal machinery and machine tools, as well as jigs. It is a screw that can be used multiple times without loosening. (It is a bolt that does not allow the nut to come off.) 【Features】 ■ Does not loosen ■ Patent Certificate No. 5712408 *For more details, please contact us.
The expansion-type rock bolt made of reinforcing steel pipes developed by K.F.C. Co., Ltd. contributes to the longevity of tunnels.
This is a new concept tunnel rock bolt that expands due to high water pressure and has a mechanism for securing itself to the surrounding rock. 【Features】 ★ Reliable construction without filling materials ★ It securely anchors to the surrounding rock using the expansion pressure of the steel pipe without using filling materials like mortar. Even in areas with water inflow, it anchors reliably without the influence of cement component leakage. ★ Speedy construction ★ No anchoring materials like mortar are needed, and it anchors simultaneously with construction, contributing to a shortened construction cycle and early strength development. ★ High corrosion-resistant rock bolt ★ The entire length of the bolt is treated with high corrosion-resistant plating, boasting high durability. This contributes to the long lifespan of tunnel structures. *For more details, please download the PDF or contact us.*
It prevents voids from occurring on the back side and ensures good adhesion along the entire length of the bolt.
The "SN Twist Bolt" is a twisted rebar lock bolt that has been cold twisted from specially manufactured high-strength deformed steel bars to further enhance its strength. When this product is inserted into a borehole filled with mortar, the spiral ribs and lateral bumps rotate the mortar, improving insertability. As a result, it prevents the formation of voids behind the ribs and bumps, ensuring good adhesion along the entire length of the bolt. 【Features】 ■ Forms a surface shape that is easy to insert into boreholes filled with mortar ■ Effective in preventing the formation of voids between the mortar and the bolt ■ Adhesion performance with mortar is superior to that of deformed steel bars ■ Rolled threads based on JIS-B-0205 standard metric coarse threads *For more details, please refer to the PDF document or feel free to contact us.
Cone-shaped tip! We are rolling metric coarse thread screws based on JIS B0205.
This product is a lock bolt made using high-strength deformed steel SD345 as specified in JIS G3112. It is processed with rolled metric threads based on JIS B0205. Additionally, the tip shape is conical. 【Features】 ■ Made with high-strength deformed steel SD345 as specified in JIS G3112 ■ Rolled metric threads based on JIS B0205 ■ Tip shape is conical *For more details, please refer to the PDF document or feel free to contact us.
A new series that improves durability and breaking strength. Required for rock reinforcement where a specified cross-section must be maintained.
This product is suitable for conditions that require higher elasticity (when the rock bolt needs to function within the elastic range and reduce deformation in the excavation area more effectively). With the improvement of yield strength and fracture strength, the excellent features of "Suerex" can now be utilized under greater load conditions. The combination of material technology and Suerex bolt functionality enables reliable installation, support functions that are effective across the entire length of the bolt immediately after installation, and the ability to respond to harsh excavation conditions. 【Features】 ■ Quality can be verified with each installation ■ Safe and simple installation work ■ Provides support capacity as per specifications immediately after installation ■ Does not require harmful chemical products ■ Corrosion resistance suitable for long-term support ■ Not affected by vibrations from blasting ■ Reduction of working time is possible *For more details, please refer to the PDF materials or feel free to contact us.
Connection via joint couplers is possible! Solid and hollow types are available in the lineup.
We handle the tunnel excavation material "GFRP Rock Bolt." We offer the solid type "CG22S," which allows for nut attachment and connection via joint couplers, and the "CGR32," which utilizes its hollow section to inject anchoring materials or ground reinforcement materials. These products can be used for applications such as middle wall construction methods, face reinforcement bolts, and injection pipes for planned excavation areas. [Features (CG22S)] - Solid type fully threaded GFRP rock bolt - Allows for nut attachment and connection via joint couplers - Suitable for applications such as middle wall construction methods and advanced guide pile pattern bolts *For more details, please refer to the PDF materials or feel free to contact us.
The entire length is rolled with R32 rope screws to ensure slime discharge performance and stable adhesion performance!
The "IBO Lock Bolt" is a hollow lock bolt with R32 threads rolled along its entire length, making it very easy to handle on-site. It is effective not only as a self-drilling bolt but also as an injection bolt utilizing its hollow structure. It can be applied to a wide range of uses, including pattern bolts, fore-poling, tunnel repairs, LW urethane, and slope reinforcement. 【Features】 ■ R32 rope threads rolled along the entire length ■ Ensures slime discharge performance and stable adhesion performance ■ Allows simultaneous drilling and bolt insertion operations, reducing cycle time ■ Pursues cost-effectiveness through bit selection according to the target geological conditions ■ Applicable to a wide range of uses *For more details, please refer to the PDF document or feel free to contact us.
Improved rust resistance! Introducing a lock bolt that is also effective as an injection bolt by utilizing the hollow space.
The "IBO-Z" is a hollow lock bolt that features R32 threads rolled along its entire length, making it very easy to handle on-site. It is effective not only as a self-drilling bolt but also as an injection bolt utilizing its hollow design. Additionally, the use of ZAM has significantly improved its corrosion resistance. It is suitable for a wide range of applications, including pattern bolts, fore-poling, and tunnel repairs. 【Features】 ■ Pursues cost-effectiveness through bit selection based on the target ground. ■ Reduces cycle time by allowing drilling and bolt insertion to be performed simultaneously. ■ R32 rope threads are rolled along the entire length, ensuring slime discharge performance and stable adhesion performance. ■ Adaptable to a wide range of applications. *For more details, please refer to the PDF document or feel free to contact us.
The bolt alone has a high anti-loosening effect! The special valley-shaped design demonstrates a wedging effect, providing a solid lock.
The "Wedge Lock Bolt" features an asymmetric thread profile in the valley and utilizes a wedge surface to provide a powerful anti-loosening effect. It prevents loosening simply by tightening. It can be reused by reducing the adhesive application process. Additionally, it allows for anti-loosening in blind hole environments where nuts cannot be used. 【Features】 ■ Reduction of adhesive ■ High anti-loosening performance - Junker: Residual axial force of over 80% - NAS method: 17 minutes of durability (3000 cycles) ■ Usable in blind holes *For more details, please refer to the PDF document or feel free to contact us.
Design and selection according to ground conditions is possible! Introducing rock bolts used in the NATM method.
This product is a rock bolt used in the NATM method, which is widely adopted for tunnel construction. We offer a variety of options, including the "UN Bolt [180kN capacity twist]," "deformed bar rock bolts," and "high-capacity rock bolts [297kN capacity]," allowing for the selection of rock bolts according to design and geological conditions. Additionally, we provide "UN Mortar," which excels in adhesion and early strength, for rock bolt anchoring. 【Product Lineup】 ■ UN Bolt [180kN capacity twist] ■ Deformed bar rock bolt ■ High-capacity rock bolt [297kN capacity] ■ UND self-drilling rock bolt ■ Rock bolt head protection material (rock bolt cap) *For more details, please refer to the PDF document or feel free to contact us.
Perfect for applications with high vibrations! Premium lock bolts with durability! Anyone can easily ensure high strength and vibration resistance.
The "C6L Hack Bolt" is an ideal fastening system for applications that require strong and vibration-resistant fixation. Its unique groove design promises permanent fixation that prevents loosening. It can be used as an optimal fastening method in various applications, including general industrial machinery manufacturing, air conditioning equipment, trailers, marine container assembly, rotating devices, shopping carts, railways, transport vehicles, measurement systems, and many other vibration-prone applications. 【Features】 ■ Innovative design ■ Vibration resistance ■ Simple installation ■ Accurate and stable axial force ■ Size: 3/16"-3/8" For more details, please refer to the catalog or feel free to contact us.
Meets high-intensity demands! Bolts that provide excellent vibration resistance and overall durability! Anyone can easily ensure high strength and vibration resistance.
The "C50L Hack Bolt" is a grade 8.8 bolt that provides excellent vibration resistance and overall durability, applicable from railway vehicles to the manufacturing of mining equipment. In extensive testing, it has demonstrated performance that matches or exceeds that of torque bolts in both shear force and axial force. Its functional superiority is also high, allowing for a quick return on investment in quality over the product's lifespan. 【Features】 ■ Vibration resistance ■ High fatigue strength ■ Accurate and stable axial force ■ Safe and quiet installation ■ Sizes: 1/2" - 1-3/8" For more details, please refer to the catalog or feel free to contact us.
Instantly anchored in the ground! Introducing rock bolts that eliminate the "uncertainty of life"!
The steel pipe expansion-type friction lock bolt has been adopted as a solution for tunnel construction projects under challenging ground conditions. Its weakness is the "uncertainty of lifespan" of the thin-walled steel pipe that is anchored in direct contact with the ground. This product addresses that weakness. The introduction of the steel pipe expansion-type friction lock bolt, which is expected to have a semi-permanent function. 【Features】 ■ Higher hardness and less prone to scratches compared to other galvanized coatings ■ No peeling of the coating layer due to expansion during construction ■ Exhibits excellent corrosion resistance under ground conditions with a pH of 4 to 12, maintaining reinforcement effects over the long term ■ Utilizes a new material with excellent elongation properties, exhibiting superior deformation characteristics *For more details, please refer to the PDF document or feel free to contact us.
High durability and instant adhesion! It can demonstrate displacement suppression effects even against large ground pressure.
This product is a rock bolt that can be applied under high pressure conditions due to its high strength (290 kN capacity). The increase in strength allows for a reduction in the number of bolts, which improves construction speed. After installation, the anchoring force is secured instantly, contributing to rapid construction. Additionally, tightening with nuts and square washers is possible. 【Features】 ■ Applicable under high pressure conditions due to high strength (290 kN capacity) ■ Improvement in construction speed by reducing the number of bolts due to increased strength ■ Instant securing of anchoring force after installation contributes to rapid construction ■ Tightening with nuts and square washers is possible *For more details, please refer to the PDF document or feel free to contact us.
Easily inject and fill grouts of various viscosities! Long-term stable support that can be done manually or automated.
The "CT Bolt" is a combined type rock bolt that is temporarily installed and later permanently secured with grout. It allows for quick and easy installation, and various viscosities of grout can be easily injected and filled, while the polyethylene sleeve protects the bolt from corrosion. Manual installation is possible, and automated installation using a specially developed rock bolt setter is also feasible. 【Features】 ■ Combined type rock bolt ■ Quick and easy installation ■ Easy injection and filling of various viscosities of grout ■ Special hemispherical dome head ■ Unique anti-corrosion structure *For more details, please refer to the PDF document or feel free to contact us.
