Janco · Electronic Components
1-1957ML-4-4NP
Switch, Rotary
Part Number1-1957ML-4-4NP
ManufacturerJanco
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-01-237-9963 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Thread Length0.430 INCHES NOMINAL SINGLE MOUNTING FACILITY
Shaft TypeROUND, FLATTED SINGLE ACTUATOR
Mounting MethodTHREADED BUSHING SINGLE MOUNTING FACILITY
Contact Voltage Rating In Volts28.0 DC AT SEA LEVEL
Pole Quantity1 EACH SECTION FRONT
Shaft Length0.370 INCHES NOMINAL SINGLE ACTUATOR
Style DesignatorTAP, CIRCULAR, BUSHING MOUNT
Rotor Through Connection Quantity1 EACH SECTION
Switch Actuator Indexing Position4 SINGLE ACTUATOR
First Flat Length0.250 INCHES NOMINAL SINGLE ACTUATOR
Terminal TypeTAB, SOLDER LUG
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 1-1957ML-4-4NP available?
We can source 1-1957ML-4-4NP 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 1-1957ML-4-4NP by Janco obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 1-1957ML-4-4NP 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 1-1957ML-4-4NP?
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 1-1957ML-4-4NP?
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.