Mason Electric · Electronic Components
PM21399
Extender Card, Electronic Test
Part NumberPM21399
ManufacturerMason Electric
AvailabilityAvailable to order — request a quote
Specifications
NSN5998-00-003-6115 (NSN)
Federal Item NameEXTENDER CARD,ELECTRONIC TEST
Federal Supply Class5998 — Circuit Card Assemblies
Vendor Part Numbers21399
ESD/EMICode B — 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 PM21399 available?
We can source PM21399 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 PM21399 by Mason Electric obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If PM21399 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 PM21399?
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 PM21399?
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.