Mmc Metrology Lab · Electronic Components
MMC-540
Voltmeter — Test Instruments
Part NumberMMC-540
ManufacturerMmc Metrology Lab
AvailabilityAvailable to order — request a quote
Specifications
NSN6625-00-971-6629 (NSN)
Federal Item NameVOLTMETER
Federal Supply Class6625 — Test Instruments
Furnished Items And QuantityWASHERS 7,NUTS 7
Mounting Stud Length0.500 INCHES NOMINAL
Meter Depth Behind Mounting Flange1.660 INCHES MAXIMUM
Mounting Stud Diameter0.150 INCHES NOMINAL
Features ProvidedMAGNETIC SHIELD
Mounting Bolt Circle Diameter3.160 INCHES NOMINAL
Dial Scale Marking ColorBLACK SINGLE INDICATOR SINGLE RANGE
Meter Body Diameter Behind Mountin2.800 INCHES MAXIMUM
Scale Division Quantity50 SINGLE INDICATOR SINGLE RANGE
Overall Diameter3.510 INCHES MAXIMUM
Installation DesignPANEL
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 MMC-540 available?
We can source MMC-540 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 MMC-540 by Mmc Metrology Lab obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If MMC-540 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 MMC-540?
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 MMC-540?
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.