MIL-SPEC · Electronic Components
S4JR20
Switch, Rotary
Part NumberS4JR20
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-259-8894 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Knob Manufacturer Part Number9000-S6202-73075-1
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Contact Switching ActionBREAKS BEFORE MAKES EACH SECTION FRONT
Pole Quantity2 EACH SECTION FRONT
Shaft Length1.344 INCHES NOMINAL SINGLE ACTUATOR
Thread Quantity Per Inch24 SINGLE MOUNTING FACILITY
Throw Quantity8 EACH SECTION FRONT
Test Data Document81349-MIL-S-21604 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DA
Hazardous Locations EnvironmentalDUSTPROOF
Square Shaft Size0.250 INCHES NOMINAL SINGLE ACTUATOR
Contact Voltage Rating In Volts125.0 AC AT SEA LEVEL
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 S4JR20 available?
We can source S4JR20 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 S4JR20 by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If S4JR20 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 S4JR20?
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 S4JR20?
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.