General Dynamics Mission Systems, Inc. · Electronic Components
340A3990
Detent, Switch
Part Number340A3990
ManufacturerGeneral Dynamics Mission Systems, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-548-5004 (NSN)
Federal Item NameDETENT,SWITCH
Federal Supply Class5930 — Switches
Overall Length1.906 INCHES NOMINAL
Shaft Length0.250 INCHES NOMINAL
Distance From Shaft End To Mountin0.500 INCHES
Shaft Width0.186 INCHES MAXIMUM
Positioning Increments In Deg30.0
Stop AdjustabilityNONADJUSTABLE
Switch Position Quantity6
Mounting MethodBUSHING
Nominal Size0.250 INCHES FRONT END
Bushing Length0.375 INCHES NOMINAL
Mounting Threads Per Inch32
Vendor Part NumbersSM-B-249227
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 340A3990 available?
We can source 340A3990 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 340A3990 by General Dynamics Mission Systems, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 340A3990 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 340A3990?
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 340A3990?
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.