Electro Adapter · Electronic Components
3121-20203
Backshell, Electrical Connector
Part Number3121-20203
ManufacturerElectro Adapter
AvailabilityAvailable to order — request a quote
Specifications
NSN5935-01-051-8350 (NSN)
Federal Item NameBACKSHELL,ELECTRICAL CONNECTOR
Federal Supply Class5935 — Connectors, Electrical
Mounting Facility Type And Quantit1 THREADED COUPLING
Nominal Thread Size1.125 INCHES
Size Designation20
Thread Series DesignatorUNS
MaterialALUMINUM ALLOY
Thread Quantity Per Inch24
Surface TreatmentCADMIUM AND CHROMATE
Style DesignatorSTRAIGHT SHAPE SOLID TYPE
Overall Length1.219 INCHES MAXIMUM
Overall Diameter1.375 INCHES NOMINAL
Thread DirectionRIGHT-HAND
Vendor Part NumbersGA801AL20SH1
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 3121-20203 available?
We can source 3121-20203 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 3121-20203 by Electro Adapter obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 3121-20203 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 3121-20203?
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 3121-20203?
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.