Products   Defacto Standard     Global Standard     Advanced Product       Fastener Engineering       Product Lineup Fasteners are essential for automobile manufacturing. "Global Standard" = Low-cost and high-tech fasteners with excellent fastening performance. "Advanced Product" = One and only products using core technologies to meet the customer needs. The products developed by Aoyama Seisakusho by combining the above two features have become indispensable to the world's automobile industry as defacto standards. There are only a few manufacturers that are capable of developing and manufacturing bolts, nuts, and screws using their own resources. Aoyama Seisakusho is the exclusive fastener manufacturer in the world that can produce them all and also manufacture products combined with plastic. Low-cost and high-tech fasteners with excellent fastening performance. One and only products using core technologies to meet the customer needs. Function and performance that are expected of the fasteners vary depending on the areas used. Aoyama's products take a lead in the industry one step ahead, assisting the driving performance of the automobiles by serving as the power behind the scene. Copyright (C) 2008 Aoyama Seisakusho Co., Ltd. All rights reserved.