MIL-SPEC · Electronic Components
AN/USM-643
Test Station, Electrical
Part NumberAN/USM-643
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN6625-01-331-7875 (NSN)
Federal Item NameTEST STATION,ELECTRICAL-ELECTRON
Federal Supply Class6625 — Test Instruments
Reference Data And Literature33D7-44-343-1 OR -4
Supply Items And Quantities6625-01-312-3513 COMPUTER CONTROL MEMORY UNIT 1 AND 6625-01-316-4910 RFSIGNAL GENERATOR CONVERTER,MEASUREMENT 1
Functional ClassificationAA-9.3
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 AN/USM-643 available?
We can source AN/USM-643 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 AN/USM-643 by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If AN/USM-643 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 AN/USM-643?
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 AN/USM-643?
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.