MIL-SPEC · Electronic Components
NAS1666-12A
Backshell, Electrical Connector
Part NumberNAS1666-12A
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5935-00-502-4359 (NSN)
Federal Item NameBACKSHELL,ELECTRICAL CONNECTOR
Federal Supply Class5935 — Connectors, Electrical
Overall Diameter1.021 INCHES MINIMUM AND 1.031 INCHES MAXIMUM
Thread Series DesignatorUNEF
Cable Opening Diameter0.384 INCHES MINIMUM AND 0.416 INCHES MAXIMUM
Surface TreatmentANODIZE
MaterialALUMINUM ALLOY
Nominal Thread Size0.750 INCHES
Thread DirectionRIGHT-HAND
Cable Opening Quantity1
Overall Length0.828 INCHES MINIMUM AND 0.890 INCHES MAXIMUM
Size Designation12
Mounting Facility Type And Quantit1 THREADED COUPLING
ESD/EMICode A — 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 NAS1666-12A available?
We can source NAS1666-12A 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 NAS1666-12A by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If NAS1666-12A 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 NAS1666-12A?
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 NAS1666-12A?
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.