MIL-SPEC · Electronic Components
S3JM8
Switch, Rotary
Part NumberS3JM8
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-031-4172 (NSN)
Federal Item NameSWITCH,ROTARY
Federal Supply Class5930 — Switches
Knob Special MarkingsARROW SIGN
Precious Material And LocationCONTACT SURFACES SILVER
Knob Manufacturer Code82121
Features ProvidedACTUATOR KNOB
Square Shaft Size0.250 INCHES NOMINAL SINGLE ACTUATOR
Overall Length7.457 INCHES NOMINAL
Overall Height2.812 INCHES NOMINAL
Shaft Length2.312 INCHES NOMINAL SINGLE ACTUATOR
Pole Quantity1 EACH SECTION FRONT
Nominal Thread Size0.190 INCHES SINGLE MOUNTING FACILITY
Test Data Document81349-MIL-S-21604 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DA
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 S3JM8 available?
We can source S3JM8 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 S3JM8 by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If S3JM8 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 S3JM8?
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 S3JM8?
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.