Keystone Electronics · Electronic Components
3121
WASHER FLAT #6 .140X.375" FIBRE
Part Number3121
ManufacturerKeystone Electronics
AvailabilityAvailable to order — request a quote
Specifications
NSN5945-00-259-9909 (NSN)
Federal Item NameRELAY,ELECTROMAGNETIC
Federal Supply Class5945 — Relays and Solenoids
Mounting Facility PatternDIAGONAL SINGLE MOUNTING FACILITY
Center To Center Distance Between0.531 INCHES NOMINAL SINGLE MOUNTING FACILITY
Winding Dc Resistance Rating900.0 OHMS NOMINAL SINGLE WINDING
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Main Contact Load Current Rating A3.0 AMPERES AC RESISTIVE LOAD
Overall Height1.750 INCHES NOMINAL
Frequency In Hertz60.0 NOMINAL
Mounting Facility Type And Quantit2 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Overall Length1.500 INCHES NOMINAL
Operating Voltage Rating And Type115.0 VOLTS AC 25 DEG CELSIUS SINGLE WINDING
Coil Quantity1
Conduit Type AccommodatedFLEXIBLE METALLIC FIRST END
Style DesignatorDOUBLE BITE SCREW CLAMP
End TypeEXTERNAL THREAD SECOND END
Furnished ItemsINSULATED BUSHING AND LOCKNUT
Nominal Thread Size2.500 INCHES SECOND END
Surface TreatmentZINC
Cable Diameter Accommodated3.062 INCHES NOMINAL FIRST END
Thread Length0.750 INCHES NOMINAL SECOND END
MaterialIRON
Vendor Part Numbers700-0-74-147-101
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 available?
We can source 3121 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 by Keystone Electronics obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 3121 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?
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?
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.