Boeing · Electronic Components
AD421-0172-0040
Insulator, Bushing
Part NumberAD421-0172-0040
ManufacturerBoeing
AvailabilityAvailable to order — request a quote
Specifications
NSN5970-00-001-1485 (NSN)
Federal Item NameINSULATOR,BUSHING
Federal Supply Class5970 — Electrical Insulators
Style DesignatorSHOULDER
Material Document And ClassificatiMIL-P-18177, TYPE GEE MIL SPEC SINGLE MATERIAL RESPONSE CLEANING WIRE
Unable To DecodeUNABLE TO DECODE
Shank Outside Diameter0.337 INCHES MINIMUM AND 0.342 INCHES MAXIMUM
Overall Height0.085 INCHES NOMINAL
MaterialPLASTIC EPOXY AND GLASS FIBER CLEANING WIRE
Shank Height0.050 INCHES NOMINAL
Outside Diameter0.562 INCHES NOMINAL
Inside Diameter0.250 INCHES MINIMUM AND 0.255 INCHES MAXIMUM
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 AD421-0172-0040 available?
We can source AD421-0172-0040 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 AD421-0172-0040 by Boeing obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If AD421-0172-0040 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 AD421-0172-0040?
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 AD421-0172-0040?
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.