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US Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir · Electronic Components
SM-B-731040
Switch, Rotary
Part NumberSM-B-731040
ManufacturerUS Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-01-027-5391 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Overall Diameter0.500 INCHES NOMINAL
Contact Voltage Rating In Volts28.0 DC AT SEA LEVEL
Terminal TypeTAB, SOLDER LUG AND TURRET
Detent Rotational Torque Range+0.500 TO 1.500 INCH-POUNDS SINGLE ACTUATOR
Contact Switching ActionBREAKS BEFORE MAKES SINGLE SECTION REAR
Shaft Flat Slot Angular Location45.0 DEGREES FROM NONTURN DEVICE SINGLE ACTUATOR
Shaft TypeROUND, SLOTTED SINGLE ACTUATOR
Overall Length0.992 INCHES NOMINAL
Shaft Length0.125 INCHES NOMINAL SINGLE ACTUATOR
Nominal Thread Size0.250 INCHES SINGLE MOUNTING FACILITY
Switch Actuator Positioning Increm90.0 DEGREES SINGLE ACTUATOR
Vendor Part Numbers50MB90-01-2-02N
Cancelled NSN5930-01-341-9007 (cancelled)
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 SM-B-731040 available?
We can source SM-B-731040 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 SM-B-731040 by US Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If SM-B-731040 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 SM-B-731040?
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 SM-B-731040?
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.