Jetronic Industries · Electronic Components
A557
Scale, Cathode Ray Tube
Part NumberA557
ManufacturerJetronic Industries
AvailabilityAvailable to order — request a quote
Specifications
NSN6625-00-553-6054 (NSN)
Federal Item NameSCALE,CATHODE RAY TUBE
Federal Supply Class6625 — Test Instruments
MaterialPLASTIC CELLULOSE ACETATE SCALE
Overall Thickness0.750 INCHES NOMINAL
FSC Application DataOSCILLOSCOPE
Scale TypeVERTICAL
Scale Division Quantity30
Mounting ConfigurationTHREE TABS 3/8 IN. W BY 3/4 IN. LG EQUALLY SPACED AROUND DIA
Overall Diameter2.938 INCHES NOMINAL
Scale Quantity1
Cancelled NSN5960-00-026-9627 (cancelled)
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 A557 available?
We can source A557 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 A557 by Jetronic Industries obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If A557 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 A557?
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 A557?
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.