Internal/external reducing unions are typically used to connect 1/16" stainless steel tubing to fused silica tubing. The 1/16" tubing is made up with an internal fitting and the fused silica tubing is made up with an external fitting. In the bulkhead version, the bulkhead nut is on the side with the internal fitting. Standard material is 300 series stainless.

Bulkhead versions are designed to be mounted through an instrument panel or on a bracket. The fitting body is undercut so that it bites into the panel when the mounting nut is tightened, eliminating the need for a lock washer. Custom configurations, such as with the external nut on the locking nut side, are available on special request.

Note:Use only our one-piece fused silica adapters in the 1/32" external detail of this union, since metal ferrules will distort it. These unions include a stainless steel ferrule for the 1/16" SS tube, but because of the variety of fused silica ODs and corresponding ferrules, a 1/32" fused silica adapter must be ordered separately.