BETAPLUGS

Betaplugs are the most successful method to seal drilled holes for critical applications. Over 100 million are in use where permanent leak-proof seals are required.

Designed to seal engine oil passages leak tight for life - without threads or sealants.

100% reliable Seal-For-LifeTM
Patented design eliminates tight tolerances and extra machining
Easy automated installation

The Betaplug Advantage

Conventional, cylindrical shaped expansion plugs require additional expansion for the clearance between the plug O.D. and the installation hole. The matching tapers of the Betaplug and its installation hole create a perfect fit, eliminating the need for additional expansion. Since the Betaplug's expansion is precisely controlled by the size of the tapered pin, the amount of expansion and any resulting boss stress is completely predictable.

Features and Advantages

Lee plug experience - maximum reliability
Ideal for fragile castings - eliminates cracking of brittle materials
Controlled expansion - ensures consistent performance
Various diameters available - design flexibility
One piece design facilitates reliable automated or manual installation
No threads or sealants required

The Lee Company has supplied approximately 70 million Lee Plugs® to the aerospace industry since 1948. Virtually every military and commercial aircraft in flight today contains Lee Plugs® in hydraulic, fuel, and lube system manifolds. The IMH Division based its commercial Lee Betaplug® designs on the same reliable, field-proven controlled expansion principle. The Lee Betaplug is a pre-assembled, one-piece, tapered expansion plug specifically engineered to seal fluid passages in metal castings and plastic housings leak-tight, without the use of threads or sealants. Controlled expansion during installation causes the lands and grooves on the O.D. of the plug body to bite into the wall of the fluid passage, creating a leak-tight seal and assuring retention. The unique tapered design eliminates the need for tight manufacturing tolerances, and allows the designer to minimize the wall thickness required around the plug, even for brittle housing materials.