Fluke Corp. · Electronic Components
642777
Crystal Unit, Quartz
Part Number642777
ManufacturerFluke Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5955-01-212-7976 (NSN)
Federal Item NameCRYSTAL UNIT,QUARTZ
Federal Supply Class5955 — Crystals and Oscillators
Overall Thickness0.183 INCHES MAXIMUM
Circuit ResonanceSERIES RESONANCE
Drive Level Rating1.0 MILLIWATTS NOMINAL AND 0.8 MILLIWATTS MINIMUM AND 1.2 MILLIWATTS MAXIMUM
Center To Center Distance Between0.192 INCHES NOMINAL
Equivalent Resistance Value In Ohm75.0 MAXIMUM
Frequency Tolerance For Operating-0.010 TO 0.010 AND -0.030 TO 0.030
Specified Frequency11.9808 MEGAHERTZ
Body Width0.402 INCHES MAXIMUM
Operating Temp Range+0.0 TO 70.0 CELSIUS
Overall Width0.435 INCHES MAXIMUM
Style DesignatorOVAL BODY, PIN TERMINALS
Vendor Part NumbersMM18-11
Precious MaterialSILVER
Precious Material And Weight0.040 SILVER GRAINS, TROY
Surface TreatmentSILVER
Material Document And ClassificatiQQ-C-504-CANCELLED FED SPEC SINGLE MATERIAL RESPONSE
Cross Sectional Width0.500 INCHES NOMINAL
MaterialCOPPER
Precious Material And LocationSURFACE SILVER
Surface Treatment Document And ClaQQ-S-365, TYPE 3, GRADE B FED SPEC SINGLE TREATMENT RESPONSE
Mounting ConfigurationFOUR HOLES; TWO 0.250 IN. DIA THREADED HOLES 0.375 IN. FROM EA END; TWO 0.199 IN. DIA HOLES LOCATED 2.500 IN. C TO C
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 642777 available?
We can source 642777 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 642777 by Fluke Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 642777 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 642777?
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 642777?
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.