MIL-SPEC · Electronic Components
40161-6251-85KC
Crystal Unit, Quartz
Part Number40161-6251-85KC
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5955-00-251-6878 (NSN)
Federal Item NameCRYSTAL UNIT,QUARTZ
Federal Supply Class5955 — Crystals and Oscillators
Specified Frequency6.25185 MEGAHERTZ
Body Length0.565 INCHES MINIMUM AND 0.583 INCHES MAXIMUM
Center To Center Distance Between0.476 INCHES MINIMUM AND 0.496 INCHES MAXIMUM
Operating Temp Range+50.0 TO 85.0 CELSIUS
Style DesignatorOVAL BODY, PIN TERMINALS
Mode Of OscillationFUNDAMENTAL
Circuit ResonanceSERIES RESONANCE
Body Thickness0.315 INCHES NOMINAL
Terminal Length0.192 INCHES MINIMUM AND 0.217 INCHES MAXIMUM
Overall Thickness0.345 INCHES MAXIMUM
Frequency Tolerance For Operating-0.007 TO 0.007
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 40161-6251-85KC available?
We can source 40161-6251-85KC 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 40161-6251-85KC by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 40161-6251-85KC 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 40161-6251-85KC?
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 40161-6251-85KC?
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.