MIL-SPEC · Electronic Components
ZM4U
Bridge, Resistance
Part NumberZM4U
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN6625-00-166-0398 (NSN)
Federal Item NameBRIDGE,RESISTANCE
Federal Supply Class6625 — Test Instruments
Relationship To Similar EquipmentWHEN EXHAUSTED USE 6625007774402; INTERCHANGEABLE W/ 6625002434845,6625005728800,6625006492868,6625000600960,66250049017
Reference Data And LiteratureDEPT OF ARMY PUBLICATIONS: TM-2019 W/ CHANGES 1&3 OCT 57,TM11-6625-249-12P JUN 57,TM11-6625-249-35P JUL 59,TB11-6625-249
MaterialWOOD CASE
Balance Indicator TypeGALVANOMETER
Adjustment MethodROTARY SWITCH
Scale Overall Accuracy Rating In P-0.150 TO 0.150
Scale Calibration0 TO 10 MEG OHMS RESISTANCE
Functional ClassificationAA-1.3
Functional DescriptionA PORTABLE WHEATSTONE BRIDGE USED TO MEASURE DC RESISTANCE OF ELECTRICAL COMPONENTS & AS AUXILIARY RESISTANCE BOXES; USE
Dc Voltage Rating1.5 VOLTS NOMINAL
Entry Date70-08-15
Vendor Part Numbers841532
Cancelled NSN6625-00-844-1348 (cancelled)
ESD/EMICode A — ESD/EMI sensitive item
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 ZM4U available?
We can source ZM4U 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 ZM4U by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If ZM4U 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 ZM4U?
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 ZM4U?
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.