US Army Aviation and Missile Command · Electronic Components
9988291
Waveguide Assembly
Part Number9988291
ManufacturerUS Army Aviation and Missile Command
AvailabilityAvailable to order — request a quote
Specifications
NSN5985-00-978-4269 (NSN)
Federal Item NameWAVEGUIDE ASSEMBLY
Federal Supply Class5985 — Antennas and Waveguides
Flange Outside Height1.610 INCHES MINIMUM AND 1.640 INCHES MAXIMUM SECOND FLANGE
Waveguide Outside Height0.500 INCHES NOMINAL
Waveguide Inside Height0.400 INCHES NOMINAL
Flange Depth0.422 INCHES MINIMUM AND 0.453 INCHES MAXIMUM SECOND FLANGE
Style DesignatorBEND TYPE
Flange StyleCHOKE TYPE FIRST FLANGE
Waveguide Offset Distance1.372 INCHES NOMINAL
Voltage Standing Wave Ratio1.08
Flange Quantity2
Waveguide Longer Offset Distance1.372 INCHES NOMINAL
Flange Inside Width0.897 INCHES MINIMUM AND 0.903 INCHES MAXIMUM FIRST FLANGE
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 9988291 available?
We can source 9988291 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 9988291 by US Army Aviation and Missile Command obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 9988291 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 9988291?
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 9988291?
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.