Lockheed Martin Corp. · Electronic Components
644747-3
Switch, Pressure
Part Number644747-3
ManufacturerLockheed Martin Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-615-2151 (NSN)
Federal Item NameSWITCH,PRESSURE
Federal Supply Class5930 — Switches
Contact AdjustabilityDEACTUATION POINT NOT ADJUSTABLE AND ACTUATION POINT NOT ADJUSTABLE
Style DesignatorCYLINDRICAL
Overall Length3.400 INCHES NOMINAL
Media For Which DesignedGAS OR LIQUID
Terminal TypeCONNECTOR, RECEPTACLE
Operating Temp Rating-60.0 FAHRENHEIT MINIMUM AND 275.0 FAHRENHEIT MAXIMUM
Contact Voltage Rating In Volts28.0 DC AT SEA LEVEL SINGLE VOLTAGE
Proof Pressure330.00 POUNDS PER SQUARE INCH GAGE
Contact Stimulus Rating75.00 ACTUATION POINT NOMINAL INCHES OF MERCURY AND 67.00 DEACTUATION POINT NOMINAL INCHES OF MERCURY AND 8.00 DIFFERENT
Contact Action StimulusINCREASE
Nominal Thread Size0.438 INCHES SINGLE PRESSURE CONNECTION
Vendor Part Numbers1019
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 644747-3 available?
We can source 644747-3 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 644747-3 by Lockheed Martin Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 644747-3 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 644747-3?
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 644747-3?
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.