Raytheon · Electronic Components
557921-1
Ammeter — Test Instruments
Part Number557921-1
ManufacturerRaytheon
AvailabilityAvailable to order — request a quote
Specifications
NSN6625-00-880-5106 (NSN)
Federal Item NameAMMETER
Federal Supply Class6625 — Test Instruments
Overall Length1.375 INCHES NOMINAL
Measurement Range+0.0 TO 10.0 MICROAMPERES, DC SINGLE INDICATOR SINGLE RANGE
Special MarkingsRED BAND FROM ZERO TO CENTER SCALE,GREEN BAND FROM CENTER SCALE TOFULL SCALE
Accuracy In Percent-2.0 TO 2.0 AT FULL SCALE SINGLE INDICATOR SINGLE RANGE
Meter Body Diameter Behind Mountin1.510 INCHES NOMINAL
Mounting Stud Diameter0.125 INCHES NOMINAL
Style DesignatorRECTANGULAR FLUSH MTG
Features ProvidedMAGNETIC SHIELD
Sensitivity Rating100.0 MICROAMPERES
Mounting Stud Length0.375 INCHES NOMINAL
Mounting Arrangement StyleFOUR HOLE/STUD RECTANGULAR/SQUARE
Vendor Part NumbersSMC660332
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 557921-1 available?
We can source 557921-1 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 557921-1 by Raytheon obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 557921-1 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 557921-1?
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 557921-1?
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.