Expansion plugs (Betaplug and Lee Plug) and insert-principle components designed for installation into metal and plastic.

The is an essential technical resource published by The Lee Company , specifically its Industrial Micro-Hydraulics (IMH) Division. Now in its 8th Edition (2025) , the handbook serves as a comprehensive guide for precision fluid control products and engineering reference material. 🛠️ Core Purpose and Scope

The full 8th Edition IMH Handbook is available for download or physical request from The Lee Company.

The handbook provides over of technical data to ensure precise integration into complex systems.

For a broader theoretical background, "Hydraulics and Pneumatics: A Technician's and Engineer's Guide" by Andrew Parr provides an accessible introduction to pumps, valves, and safety standards. IMH Handbook of Hydraulics and Pneumatics

Detailed guidance on the "insert principle," which uses a pre-installed pin to expand a grooved body into a housing wall, creating a permanent seal.

For those looking to dive deeper into the general principles or acquire the handbook itself:

The IMH group's quality system is certified to IATF 16949 , the global automotive industry quality standard.