Kirkhill, Inc. · Electronic Components
S12521
Insulation Sleeving, Electrical, S
Part NumberS12521
ManufacturerKirkhill, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5970-00-072-7685 (NSN)
Federal Item NameINSULATION SLEEVING,ELECTRICAL,S
Federal Supply Class5970 — Electrical Insulators
Distance From Bottom Of Shoulder T0.310 INCHES NOMINAL AS SUPPLIED
Main Body Overall Length0.680 INCHES NOMINAL AS SUPPLIED
FlexibilitySEMIRIGID
Main Body Wall Thickness0.030 INCHES NOMINAL AS SUPPLIED
Main Body Small End Inside Diamete0.281 INCHES NOMINAL AS SUPPLIED
Style DesignatorBOOT-STRAIGHT
Distance From Top Of Shoulder To S0.370 INCHES NOMINAL AS SUPPLIED
ColorBLACK
Reliability IndicatorNOT ESTABLISHED
Main Body Large End Inside Diamete0.376 INCHES NOMINAL AS SUPPLIED
MaterialRUBBER SYNTHETIC LOCATION NOT OTHERWISE SPECIFIED
Vendor Part Numbers948184-506, 421-0253-001
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 S12521 available?
We can source S12521 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 S12521 by Kirkhill, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If S12521 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 S12521?
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 S12521?
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.