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Naval Air Systems Command Managed Original Design Activity Not Material/Parts Supplier · Electronic Components
639AS1256
Holder, Electrical Card
Part Number639AS1256
ManufacturerNaval Air Systems Command Managed Original Design Activity Not Material/Parts Supplier
AvailabilityAvailable to order — request a quote
Specifications
NSN5998-01-044-8939 (NSN)
Federal Item NameHOLDER,ELECTRICAL CARD
Federal Supply Class5998 — Circuit Card Assemblies
Material Document And ClassificatiQQ-C-533 FED SPEC SINGLE MATERIAL RESPONSE
Surface Treatment Document And ClaQQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE
MaterialCOPPER ALLOY
Surface TreatmentCADMIUM
Overall Length6.000 INCHES NOMINAL
Unthreaded Mounting Hole Diameter0.067 INCHES NOMINAL SINGLE MOUNTING FACILITY
Body StyleDOUBLE FLAIR ENTRY
Mounting Facility Type And Quantit2 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
Overall Height0.125 INCHES NOMINAL
Overall Width0.190 INCHES NOMINAL
Vendor Part Numbers21B-1021-2-12-3, 11567787
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 639AS1256 available?
We can source 639AS1256 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 639AS1256 by Naval Air Systems Command Managed Original Design Activity Not Material/Parts Supplier obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 639AS1256 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 639AS1256?
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 639AS1256?
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.