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US Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir · Electronic Components
SM-A-718671-3
Waveguide Assembly
Part NumberSM-A-718671-3
ManufacturerUS Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
AvailabilityAvailable to order — request a quote
Specifications
NSN5985-01-037-7352 (NSN)
Federal Item NameWAVEGUIDE ASSEMBLY
Federal Supply Class5985 — Antennas and Waveguides
Waveguide Outside Width1.246 INCHES MINIMUM AND 1.254 INCHES MAXIMUM
Surface TreatmentSILVER ALL TUBING SEGMENT AND FLANGE INSIDE SURFACES
Flange Outside Height1.860 INCHES MINIMUM AND 1.890 INCHES MAXIMUM ALL FLANGES
Tubing Twist Angle In Deg90.0 SINGLE TUBING SEGMENT
Flange Depth0.423 INCHES MINIMUM AND 0.453 INCHES MAXIMUM ALL FLANGES
Waveguide Length6.000 INCHES NOMINAL
Flange Connecting Hole Diameter0.169 INCHES MINIMUM AND 0.172 INCHES MAXIMUM ALL FLANGES ALL CONNECTION FACILITIES
MaterialCOPPER ALLOY ALL TUBING SEGMENT AND FLANGE
Waveguide Inside Height0.493 INCHES MINIMUM AND 0.501 INCHES MAXIMUM
Flange Inside Height0.628 INCHES MINIMUM AND 0.631 INCHES MAXIMUM ALL FLANGES
Precious Material And LocationINTERNAL SURFACES SILVER
Vendor Part Numbers590-2
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 SM-A-718671-3 available?
We can source SM-A-718671-3 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 SM-A-718671-3 by US Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If SM-A-718671-3 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 SM-A-718671-3?
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 SM-A-718671-3?
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.