MIL-SPEC · Electronic Components
MS21437-A331
Switch, Toggle
Part NumberMS21437-A331
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-01-203-4008 (NSN)
Federal Item NameSWITCH,TOGGLE
Federal Supply Class5930 — Switches
Maximum Voltage Rating In Volts115.0 AC AND 28.0 DC
Precious Material And LocationTERMINAL SURFACES GOLD
Overall Height2.277 INCHES NOMINAL
Actuator Diameter0.430 INCHES MAXIMUM
Nonpile Up Contact Arrangement2 POLE, DOUBLE THROW, THREE POSITIONS MAINTAINED SINGLE SWITCH UNIT
Thread Series DesignatorUNS
Criticality Code JustificationFEAT
Nominal Thread Size0.469 INCHES
Actuator StyleROUND
Bushing Length0.438 INCHES NOMINAL
Body Width0.560 INCHES MAXIMUM
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 MS21437-A331 available?
We can source MS21437-A331 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 MS21437-A331 by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If MS21437-A331 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 MS21437-A331?
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 MS21437-A331?
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.