Nassau · Electronic Components
GB21A5
Heat Sink, Electrical
Part NumberGB21A5
ManufacturerNassau
AvailabilityAvailable to order — request a quote
Specifications
NSN5999-01-321-9172 (NSN)
Federal Item NameHEAT SINK,ELECTRICAL-ELECTRONIC
Federal Supply Class5999 — Miscellaneous Electrical Components
Unthreaded Mounting Hole Diameter0.165 INCHES MINIMUM AND 0.171 INCHES MAXIMUM SECOND MOUNTING FACILITY
Mounting Facility Type And Quantit5 UNTHREADED HOLE(S) SECOND MOUNTING FACILITY
Material Document And ClassificatiQQ-A-200 FED SPEC SINGLE MATERIAL RESPONSE
Overall Diameter1.000 INCHES NOMINAL
Overall Height0.218 INCHES MINIMUM AND 0.234 INCHES MAXIMUM
Surface TreatmentTIN
MaterialALUMINUM ALLOY 6061
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 GB21A5 available?
We can source GB21A5 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 GB21A5 by Nassau obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If GB21A5 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 GB21A5?
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 GB21A5?
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.