Nippon Steel Corporation

Nittetsu Bolten Kabushiki Kaisha

Shoji Shimada

Toshio Sakurai

Yoshiharu Kamimura

Kazuhiko Yoshinari

Takeo Kuwata

Hidefumi Koyakumaru

Mikio Usa

A fastener set comprising a bolt body, a nut and a washer which are fitted onto the bolt body. Said bolt body has a notched portion which can be broken by a predetermined torsional force. Said nut is coated by a composition containing a ester obtained by only partial esterification of a polyol having not more than twelve carbon atoms and a fatty acid or an oxy-acid. The reaction force resulted from a fastening torque applied to the nut is transmitted to the bolt body so as to break off from the bolt body a surplus portion extending above the notched portion.

Fastener set

A process of annealing for preventing temper colors on a steel sheet in a box annealing furnace, which comprises placing an oxidizable iron-base material at a position of low temperature in a circulating path of a furnace gas.

Process of annealing for preventing temper colors on a steel sheet

Rust-proof lubricant compositions for coating metals comprising mono, di- or tri-partial esters synthesized from pentaerythritol and fatty acids having more than 6 carbon atoms including the corresponding isomers, or a mixutre thereof as chief constituents.

Rust-proof lubricant compositions

Growing community of inventors

Kitakyushu, Japan

Shoji Shimada