The Boeing Company · Electronic Components
3-99402
Insulator, Washer
Part Number3-99402
ManufacturerThe Boeing Company
AvailabilityAvailable to order — request a quote
Specifications
NSN5970-00-526-9201 (NSN)
Federal Item NameINSULATOR,WASHER
Federal Supply Class5970 — Electrical Insulators
MaterialPLASTIC PHENOLIC AND COTTON OVERALL
Material Document And ClassificatiMIL-P-15035, TYPE FBM-CANCELLED/REPLACED BY MIL SPEC SINGLE MATERIAL RESPONSE OR MIL-I-24768/16 MIL SPEC SINGLE MATERIA
Style DesignatorROUND, FLAT
Inside Diameter1.560 INCHES NOMINAL
Overall Height0.047 INCHES NOMINAL
Outside Diameter2.250 INCHES NOMINAL
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 3-99402 available?
We can source 3-99402 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 3-99402 by The Boeing Company obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 3-99402 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 3-99402?
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 3-99402?
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.