NKK Switches · Electronic Components
S421
SW TOGGLE DPST 25A SOLDER LUG
Part NumberS421
ManufacturerNKK Switches
AvailabilityAvailable to order — request a quote
Specifications
NSN5120-01-335-0823 (NSN)
Federal Item NameSOCKET,SOCKET WRENCH
MaterialSTEEL OVERALL
Overall Length2.93 INCHES MINIMUM
Features ProvidedMANUAL TOOL
Wrenching End Outside Diameter1.675 INCHES MAXIMUM
Drive End Outside Diameter1.675 INCHES MAXIMUM
Wrenching End Opening Depth0.656 INCHES MINIMUM
Drive End ShapeSQUARE SINGLE END INTERNAL
Style DesignatorINTERNAL-INTERNAL
Wrenching Surface Size1.312 INCHES NOMINAL SINGLE END
Wrenching Surface Shape12 POINT SINGLE END INTERNAL
Federal Supply Class5120 — Hand Tools, Nonedged, Nonpowered
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 S421 available?
We can source S421 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 S421 by NKK Switches obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If S421 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 S421?
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 S421?
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.