MIL-SPEC · Electronic Components
5721
Electron Tube
Part Number5721
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5960-00-261-9641 (NSN)
Federal Item NameELECTRON TUBE
Federal Supply Class5960 — Electron Tubes
Nondefinitive Spec Std Data5721 TYPE
Tube TypeKLYSTRON
Unthreaded Mounting Hole Diameter0.038 INCHES MINIMUM AND 0.109 INCHES MAXIMUM
Style DesignatorIRREGULAR SHAPE
Overall Width0.750 INCHES NOMINAL
Overall Height0.500 INCHES NOMINAL
Mounting Facility Quantity1
Voltage Rating In Volts250.0 DC
MaterialCOPPER BODY
Terminal Type And Quantity1 SCREW AXIALLY AT ONE END
Overall Length2.453 INCHES NOMINAL
Mounting MethodUNTHREADED HOLE(S)
Current Rating In Amps25.0
ESD/EMICode A — ESD/EMI sensitive item
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is 5721 available?
We can source 5721 even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is 5721 by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 5721 has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like 5721?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for 5721?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.