Seastrom Manufacturing · Electronic Components
A121-52
Insulator, Bushing
Part NumberA121-52
ManufacturerSeastrom Manufacturing
AvailabilityAvailable to order — request a quote
Specifications
NSN5970-00-983-8948 (NSN)
Federal Item NameINSULATOR,BUSHING
Federal Supply Class5970 — Electrical Insulators
MaterialPLASTIC POLYHEXAMETHYLENE AMIDE OVERALL
Material Document And ClassificatiMIL-M-20693, TYPE 1 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
Shank Outside Diameter0.177 INCHES MINIMUM AND 0.187 INCHES MAXIMUM
Style DesignatorSHOULDER
Shank Height0.020 INCHES MINIMUM AND 0.030 INCHES MAXIMUM
Overall Height0.094 INCHES NOMINAL
Outside Diameter0.312 INCHES MINIMUM AND 0.328 INCHES MAXIMUM
Inside Diameter0.136 INCHES MINIMUM AND 0.146 INCHES MAXIMUM
Cancelled NSN5970-01-112-6099 (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 A121-52 available?
We can source A121-52 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 A121-52 by Seastrom Manufacturing obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If A121-52 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 A121-52?
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 A121-52?
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.