Precautions for use

Properties of plastic differ by material. Please ensure to read before using.

PC 【Polycarbonate】

・Please use torque driver or torque wrench for fastening. Recommended fastening torque is 50% of breaking torque value under actual use conditions.
・Since heat resistance and chemical resistance changes according to use conditions, ensure to test under actual use conditions beforehand.
・Exposure to water or vapor at high temperatures may significantly reduce the mechanical strength due to hydrolysis. Therefore, avoid exposure to water or vapor at high temperatures.
・Avoid exposure to ammonia as it accelerates hydrolysis.
・Exposure to organic solvents or oils may cause cracks even at low stress. Moreover, cracks may be caused by plasticizing agents contained in rubber and PVC (Polyvinyl Chloride). Therefore, avoid exposure to organic solvents, oils, rubber and PVC.
・Black spots (sludge) may appear on the external surface. However, this has no impact on performance.
・Gate residue of screw head is 0.2mm or less.
・Discoloration to some extent may occur depending on lot and various conditions.
・Size available in stock, configuration and manufacturers of raw materials used may change without any notice.

PPS 【polyphenylene sulfide】

・Please use torque driver or torque wrench for fastening. Recommended fastening torque is 50% of breaking torque value under actual use conditions.
・Since heat resistance and chemical resistance changes according to use conditions, ensure to test under actual use conditions beforehand.
・Exposure to ultraviolet rays will make the surface rough. (However, mechanical strength will remain 90% of the original strength even after outdoor exposure for one year)
・Black spots (sludge) may appear on the external surface. However, this has no impact on performance.
・Gate residue of screw head is 0.2mm or less.
・Discoloration to some extent may occur depending on lot and various conditions.
・Size available in stock, configuration and manufacturers of raw materials used may change without any notice.

RENY 【RENY (Glass-fiber-reinforced polyamide MXD6) 】

・Please use torque driver or torque wrench for fastening. Recommended fastening torque is 50% of breaking torque value under actual use conditions.
・Since heat resistance and chemical resistance changes according to use conditions, ensure to test under actual use conditions beforehand.
・Take sufficient factor of safety when designing as fiber reinforced screws have large variation in fracture strength (±15%).
・Black spots (sludge) may appear on the external surface. However, this has no impact on performance.
・Gate residue of screw head is 0.2mm or less.
・Discoloration to some extent may occur depending on lot and various conditions.
・Size available in stock, configuration and manufacturers of raw materials used may change without any notice.

PEEK 【Polyether ether ketone】

・Please use torque driver or torque wrench for fastening. Recommended fastening torque is 50% of breaking torque value under actual use conditions.
・Since heat resistance and chemical resistance changes according to use conditions, ensure to test under actual use conditions beforehand.
・Since pitch misalignment of screw may occur during molding, use it in combination with the nut made of same material. (If nut is not used, ensure that clearance with screw is 20 mm or more)
*PEEK(R) is a registered trademark of Victrex plc. in Japan.

PP 【Polypropylene】

・Please use torque driver or torque wrench for fastening. Recommended fastening torque is 50% of breaking torque value under actual use conditions.
・Since heat resistance and chemical resistance changes according to use conditions, ensure to test under actual use conditions beforehand.
・Since pitch misalignment of screw may occur during molding, use it in combination with the nut made of same material. (If nut is not used, ensure that clearance with screw is 21 mm or more)
・Although it is chemically stable and has excellent resistance to chemicals, take precautions for chemicals like strong acids and hydrocarbon solvents like gasoline.
・As resistance weather is low, precaution is necessary in case of outdoor use.
・Using after exposure to heavy metals like copper, brass and iron will significantly accelerate degradation (oxidation degradation) shortening the life. Therefore, avoid exposure to these metals.
・Black spots (sludge) may appear on the external surface. However, this has no impact on performance.
・Gate residue of screw head is 0.2mm or less.
・Discoloration to some extent may occur depending on lot and various conditions.
・Size available in stock, configuration and manufacturers of raw materials used may change without any notice.

PVC 【Polyvinyl Chloride】

･Please use torque driver or torque wrench for fastening. Recommended fastening torque is 50% of breaking torque value under actual use conditions.
･Since heat resistance and chemical resistance changes according to use conditions, ensure to test under actual use conditions beforehand.
･Since pitch misalignment of screw may occur during molding, use it in combination with the nut made of same material. (If nut is not used, ensure that clearance with screw is 21 mm or more)
･Black spots (sludge) may appear on the external surface. However, this has no impact on performance.
･Gate residue of screw head is 0.2mm or less.
･Discoloration to some extent may occur depending on lot and various conditions.
･Size available in stock, configuration and manufacturers of raw materials used may change without any notice.
*PVC only
･Washer may scrape a little bit.

PFA 【Perfluoro alkoxyalkane】

･Please use torque driver or torque wrench for fastening. Recommended fastening torque is 50% of breaking torque value under actual use conditions.
･Since heat resistance and chemical resistance changes according to use conditions, ensure to test under actual use conditions beforehand.
･Since pitch misalignment of screw may occur during molding, use it in combination with the nut made of same material. (If nut is not used, ensure that clearance with screw is 21 mm or more)
･Black spots (sludge) may appear on the external surface. However, this has no impact on performance.
･Gate residue of screw head is 0.2mm or less.
･Discoloration to some extent may occur depending on lot and various conditions.
･Size available in stock, configuration and manufacturers of raw materials used may change without any notice.

PVDF 【polyvinylidene-fluoride】

・Please use torque driver or torque wrench for fastening. Recommended fastening torque is 50% of breaking torque value under actual use conditions.
・Since heat resistance and chemical resistance changes according to use conditions, ensure to test under actual use conditions beforehand.
・Since pitch misalignment of screw may occur during molding, use it in combination with the nut made of same material. (If nut is not used, ensure that clearance with screw is 21 mm or more)
・Black spots (sludge) may appear on the external surface. However, this has no impact on performance.
・Gate residue of screw head is 0.2mm or less.
・Discoloration to some extent may occur depending on lot and various conditions.
・Size available in stock, configuration and manufacturers of raw materials used may change without any notice.

CERAMIC 【Ceramic (Alumina 96%)】

･Please use torque driver or torque wrench for fastening. Recommended fastening torque is 50% of breaking torque value under actual use conditions.
･Since heat resistance and chemical resistance changes according to use conditions, ensure to test under actual use conditions beforehand.

POM 【Polyacetal】

・Please use torque driver or torque wrench for fastening. Recommended fastening torque is 50% of breaking torque value under actual use conditions.
・Since heat resistance and chemical resistance changes according to use conditions, ensure to test under actual use conditions beforehand.
・As it is not resistant to strong acids and strong basis, especially since resistance to strong acids is very weak, avoid applications that need exposure to them.
・Since copper is a decomposition catalyst, avoid applications that need exposure to copper at the time of melting (insert of brass etc.)
・As resistance weather is low, precaution is necessary in case of outdoor use.
・As it is inflammable, it is necessary to keep it away from heat and fire sources during handling and storage.
・Black spots (sludge) may appear on the external surface. However, this has no impact on performance.
・Gate residue of screw head is 0.2mm or less.
・Discoloration to some extent may occur depending on lot and various conditions.
・Size available in stock, configuration and manufacturers of raw materials used may change without any notice.

PS 【Polyslider】

･Since heat resistance and chemical resistance changes according to use conditions, ensure to test under actual use conditions beforehand.

PO 【Polysoul】

・Since heat resistance and chemical resistance changes according to use conditions, ensure to test under actual use conditions beforehand.