Hydro-Aire Aerospace Corp. · Electronic Components
RD18990
Switch, Pressure
Part NumberRD18990
ManufacturerHydro-Aire Aerospace Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-949-6556 (NSN)
Federal Item NameSWITCH,PRESSURE
Federal Supply Class5930 — Switches
Body Length1.500 INCHES NOMINAL
Overall Length2.453 INCHES NOMINAL
Overall Diameter1.310 INCHES NOMINAL
Nominal Thread Size0.125 INCHES SINGLE PRESSURE CONNECTION
Proof Pressure35.00 POUNDS PER SQUARE INCH
Thread Series DesignatorNPT SINGLE PRESSURE CONNECTION
Style DesignatorCYLINDRICAL
Terminal TypeWIRE LEAD
Contact AdjustabilityDEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
Mounting MethodINLET CONNECTION
Contact Load Current Rating1.0 AMPERES RESISTIVE LOAD FIRST VOLTAGE
Vendor Part Numbers506107-03-5
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 RD18990 available?
We can source RD18990 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 RD18990 by Hydro-Aire Aerospace Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If RD18990 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 RD18990?
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 RD18990?
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.