Sigma

IWATA BOLT Informational Magazine.

Sigma

IWATA BOLT Informational Magazine.

  • Oct 1969 Issue

    Oct 1969 Issue

    [Sigma 2]

    • 1.System and Screws ... Yukichi Iwata, President
    • Control System of Iwata Bolt 
    • 2.SPICS that utilizes the cock warehouse method
    • From Quality Control Section 
    • 3.Quality assurance system in our manufacturing department (2)
    • Explanation of screw terms 2
    • 4.Tapping Screw
    • Overseas spot news
    • 5.The wide spreading roles of fastening
    • 6.One Jumbo jet uses 700,000 screws, worth $ 1 million
    • 7.Deburring of screw parts by chemical milling
  • Sep 1969 Issue

    Sep 1969 Issue

    [Sigma 1]

    • 1.Issuing ... Yukichi Iwata, President
    • Control System of Iwata Bolt
    • 2.Current status of our IT department
    • From Quality Control Section
    • 3.Quality assurance system in our manufacturing department
    • Explanation of screw terms 1
    • 4.Regarding the distinction between bolts and screws
    • Overseas spot news
    • 5.US screw production is about 600 billion yen, about 4 times that of Japan
    • 6.The tightening standards for automobile fasteners
    • 7.Nut inspection for 7200 pieces per hour
    • 8.MP35N gets attention as a fastener material for space and ocean development
    • 9.Increased interest in aluminum coating due to corrosion resistance