Smiths Aerospace, Inc., Electronic Systems-Grand Rapids · Electronic Components
21218
Insulator, Plate
Part Number21218
ManufacturerSmiths Aerospace, Inc., Electronic Systems-Grand Rapids
AvailabilityAvailable to order — request a quote
Specifications
NSN5970-01-098-6156 (NSN)
Federal Item NameINSULATOR,PLATE
Federal Supply Class5970 — Electrical Insulators
First Hole Diameter0.312 INCHES NOMINAL
MaterialGLASS FIBER AND PLASTIC EPOXY OVERALL
Style DesignatorFLAT, RECTANGULAR
First Hole Spacing3.050 INCHES NOMINAL
Overall Width3.600 INCHES NOMINAL
Overall Length5.850 INCHES NOMINAL
Material Document And ClassificatiMIL-P-18177, TYPE GEE MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Second Hole Spacing1.550 INCHES NOMINAL
Vendor Part Numbers989112-81B
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 21218 available?
We can source 21218 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 21218 by Smiths Aerospace, Inc., Electronic Systems-Grand Rapids obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 21218 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 21218?
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 21218?
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.