TPMM250K (Micro-Miniature Rivet Fan Spacer / Hole Spacing Guide Set)

The TPMM250K is a specialized layout tool used in aircraft sheet metal fabrication and airframe repair to lay out rivet pitch and fastener hole centers quickly and accurately.

​Key features and specifications:

​Function: Operates on an accordion/pantograph expansion mechanism to automatically maintain equal distance between all hole guides regardless of total span.

​Design: The "MM" (Micro-Miniature) series features smaller guide tips and tighter pin spacing designed specifically for tight-margin layout work, flange areas, and smaller structural components.

​Kit Contents: Typically comes as a complete kit including the expandable fan guide frame and interchangeable guide pins or bushings for marked hole transfer.