We primarily handle a wide range of industrial fasteners, including various stainless steel screws and engineering plastic screws.
Applying this development technology, we have recently introduced numerous engineering plastic products such as guidance and warning blocks for the visually impaired, as well as parts basers and pressed parts, into new markets.

Furthermore, we have achieved world-first success in commercializing products made from metals that were previously considered difficult to plastically process, such as magnesium alloys and titanium-based shape memory alloys. Moving forward, we will continue to dedicate ourselves to the development and manufacturing of screws and fasteners made from new materials focusing on "high strength," "high corrosion resistance," "lightweight," "environmental friendliness," and "recyclability," transforming your new needs into concrete products and delivering them with the highest quality.

World's lightest magnesium alloy screw

Screws made from magnesium alloy, the lightest of all practical metals used in structural materials, are not only lightweight but also possess many advantages due to being made of the same material, making them ideal for fastening magnesium alloy components, which are expected to become even more widespread in the future. "Magnesium alloy screws are ideal for fastening magnesium alloy parts." Maru-M Manufacturing has been mass-producing AZ31 screws since 2004, but to enable applications in an even wider range of fields, they have developed screws using AZX912, which has high strength and heat resistance, through the Ministry of Economy, Trade and Industry's Advanced Technology Support Project.

By utilizing the unique properties of metallic glass—high yield strength and low Young's modulus—we have developed a bolt with high strength, a low spring number, and a low internal-external force ratio. This bolt also achieves toughness and enables mass production by applying cold plastic deformation (rolling) of metallic glass, a process previously considered impossible.
Furthermore, the high strength and low spring constant characteristics make it gentle on the mating material and also give the bolt itself a function that prevents it from loosening.
Metallic glass screws possess 1.3 times the strength of high-strength copper screws. Furthermore, cold plastic deformation (rolling), which was previously considered impossible for metallic glass, allows them to exhibit toughness not seen in machined metallic glass screws. In addition, the pressure-compensating stress on the surface is expected to contribute to improved fatigue strength. On the other hand, the screw head maintains a high yield ratio, resulting in ideal mechanical durability that withstands repeated tightening and loosening.

We have worked to commercialize "GUMMETAL," a new Ti-Nb-based material that possesses excellent orthodontic ability and biocompatibility, but was considered extremely difficult to mold stably. We have succeeded in establishing our own unique wire processing technology and cold bending process.
Furthermore, using specially designed, highly advanced wire manufacturing equipment, we have succeeded in producing high-precision, low-friction wires without compromising GUMMETAL's mechanical properties (high strength and low Young's modulus). We manufacture high-precision, high-quality archwires from not only round shapes, but also irregular shapes such as squares and rectangles, utilizing our proprietary bending machines that incorporate our unique know-how.
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Maru-M Manufacturing Co., Ltd. obtained a "Medical Device Manufacturing License" (license number: 27BZ200136) from Osaka Prefecture in 2009.
Furthermore, in order to continue providing products worldwide under a comprehensive quality control system, we obtained ISO 13485 certification in 2010.

Marine Stainless Steel (MS-270) is an austenitic stainless steel that has superior chloride corrosion resistance and stress corrosion cracking resistance compared to SUS316 and duplex stainless steel.
The MS-270 achieves maintenance-free operation.