Janco Corporation · Electronic Components
77-1991
Switch, Rotary
Part Number77-1991
ManufacturerJanco Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-126-3428 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Thread Series DesignatorUNEF SINGLE MOUNTING FACILITY
Switch Actuator Positioning Increm30.0 DEGREES FIRST ACTUATOR
Switch Actuator Stop Device TypeFIXED STOP FIRST ACTUATOR
Contact Load Current Rating1.0 AMPERES RESISTIVE LOAD AC AT SEA LEVEL
Thread Class2A SINGLE MOUNTING FACILITY
Style DesignatorTAP, CIRCULAR, BUSHING MOUNT
Individual Section Quantity2
Hazardous Locations EnvironmentalEXPLOSION PROOF
Shaft Diameter0.123 INCHES MINIMUM AND 0.126 INCHES MAXIMUM SECOND ACTUATOR
Contact Switching ActionBREAKS BEFORE MAKES EACH SECTION REAR
Nonturn Device TypeTAB AT 9:00 OCLOCK
Vendor Part Numbers722008-1
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 77-1991 available?
We can source 77-1991 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 77-1991 by Janco Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 77-1991 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 77-1991?
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 77-1991?
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.