Lockheed Martin Corp. · Electronic Components
129406-1
Heat Sink, Electrical
Part Number129406-1
ManufacturerLockheed Martin Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5999-01-281-0497 (NSN)
Federal Item NameHEAT SINK,ELECTRICAL-ELECTRONIC
Federal Supply Class5999 — Miscellaneous Electrical Components
Overall Width2.985 INCHES MINIMUM AND 3.015 INCHES MAXIMUM
Criticality Code JustificationFEAT
MaterialALUMINUM ALLOY
Overall Height1.850 INCHES MINIMUM AND 1.910 INCHES MAXIMUM
Mounting Facility Type And Quantit4 UNTHREADED HOLE(S) ALL MOUNTING FACILITIES
Unthreaded Mounting Hole Diameter0.093 INCHES NOMINAL ALL MOUNTING FACILITIES
Overall Length4.690 INCHES MINIMUM AND 4.810 INCHES MAXIMUM
Surface TreatmentANODIZE
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 129406-1 available?
We can source 129406-1 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 129406-1 by Lockheed Martin Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 129406-1 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 129406-1?
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 129406-1?
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.