MDC 5-Way High Vacuum Fitting CF 2 3/4 Flanges. The fitting with flanges appears to be 5" length end to end & 5th tube hole is about 1 3/4" long. Two flange are stationary and three are rotatable. Marked MDC with no number.
I took pictures with measurements to help. I have a very similar unmarked version up as well. This came from a UC Berkeley lab surplus.
The nuclear science program is excellent. Please see the pictures to make a more expert assessment.The item "MDC 5-Way High Vacuum Fitting CF 2 3/4 Flanges 5 length MDC" is in sale since Saturday, October 24, 2020. This item is in the category "Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Vacuum Pumps\Other Vacuum Pumps". The seller is "tiggerbounce2u" and is located in Sacramento, California. This item can be shipped to United States, Canada, United Kingdom, China, Mexico, Germany, Japan, France, Australia, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Greece, Portugal, Cyprus, Slovenia, Sweden, South Korea, Taiwan, South africa, Thailand, Belgium, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Austria, Bahamas, Israel, New Zealand, Philippines, Singapore, Switzerland, Norway, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Antigua and barbuda, Aruba, Belize, Dominica, Grenada, Saint kitts and nevis, Saint lucia, Montserrat, Turks and caicos islands, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.