Raytheon Company · Electronic Components
MB128
Support, Electrical Card Holder
Part NumberMB128
ManufacturerRaytheon Company
AvailabilityAvailable to order — request a quote
Specifications
NSN5998-00-916-1689 (NSN)
Federal Item NameSUPPORT,ELECTRICAL CARD HOLDER
Federal Supply Class5998 — Circuit Card Assemblies
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE MOUNTING FACILITY
Surface Treatment Document And ClaQQ-P-416,CLASS 2,TYPE 2 FED SPEC SINGLE TREATMENT RESPONSE
MaterialSTEEL
Overall Length3.562 INCHES NOMINAL
Mounting Facility Type And Quantit5 THREADED HOLE(S) SINGLE MOUNTING FACILITY
Surface TreatmentCADMIUM
Overall Height0.656 INCHES NOMINAL
Nominal Thread Size0.138 INCHES SINGLE MOUNTING FACILITY
Thread Class2B SINGLE MOUNTING FACILITY
Overall Width0.437 INCHES NOMINAL
Vendor Part NumbersGB550E-4, 217-1044P4, 328AS215-1
Cancelled NSN6660-00-723-7818 (cancelled)
ESD/EMICode B — 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 MB128 available?
We can source MB128 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 MB128 by Raytheon Company obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If MB128 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 MB128?
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 MB128?
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.