Stainless Steel Vacuum Port 1" OD KF Flange 3/8" Barb Nipple 2" Threaded Cap

Stainless Steel Vacuum Port 1" OD KF Flange 3/8" Barb Nipple 2" Threaded Cap

This stainless steel vacuum port is a compact, polished fitting designed to pass a gas line or vacuum connection through a sealed vacuum chamber wall or lid. The assembly combines a small-diameter KF-style flange (approximately 1" OD) mounted on an elbow tube with a 3/8" barbed nipple for hose attachment, all rising from a large 2" knurled threaded base that threads into the chamber port opening. The knurled cap secures the fitting in place and maintains seal integrity at the interface.

Specifications & What's Included

• Material: Stainless steel — polished bright finish
• Flange OD: approximately 1" (KF-style small flange on elbow end)
• Barb / nipple size: 3/8"
• Base thread size: 2" threaded (threads into chamber port or lid opening)
• Base style: knurled cylindrical base for hand-tightening
• Elbow configuration: 90° elbow connecting base to flange
• Engraved markings on base: HTH991ADN / HTH002ACW (internal lot codes)
• Included: vacuum port assembly with threaded cap

Applications

Vacuum port fittings like this one are used to create a gas inlet, vent, or instrument feedthrough on laboratory vacuum chambers, desiccators, and thin-film deposition systems. The barbed nipple accommodates flexible vacuum or gas tubing, allowing a controlled connection between the inside of the chamber and external pumps, gauges, or gas lines. The threaded base design is common on smaller laboratory bell-jar chambers and custom vacuum fixtures where a simple threaded port provides a robust, reusable seal point. These fittings are widely used in research labs, semiconductor process equipment, vacuum coating systems, and general scientific apparatus that requires controlled atmosphere or sub-atmospheric pressure environments. Stainless steel construction makes the fitting compatible with a broad range of process gases and cleaning agents.