MIL-SPEC · Electronic Components
CR-18/U6.938889MHZ
Crystal Unit, Quartz
Part NumberCR-18/U6.938889MHZ
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5955-00-669-0674 (NSN)
Federal Item NameCRYSTAL UNIT,QUARTZ
Federal Supply Class5955 — Crystals and Oscillators
Overall Width0.750 INCHES NOMINAL
Operating Temp Range-55.0 TO 90.0 CELSIUS
Center To Center Distance Between0.486 INCHES NOMINAL
Style DesignatorOVAL BODY, PIN TERMINALS
Body Length0.765 INCHES NOMINAL
Specified Frequency6.938889 MEGAHERTZ
Overall Thickness0.345 INCHES NOMINAL
Terminal Length0.238 INCHES NOMINAL
Mode Of OscillationFUNDAMENTAL
Overall Length1.003 INCHES NOMINAL
Frequency Tolerance For Operating-0.005 TO 0.005
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 CR-18/U6.938889MHZ available?
We can source CR-18/U6.938889MHZ 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 CR-18/U6.938889MHZ by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If CR-18/U6.938889MHZ 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 CR-18/U6.938889MHZ?
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 CR-18/U6.938889MHZ?
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.