Keystone Electronics · Electronic Components
8404
STDOFF HEX M/F 4-40 .875"L ALUM
Part Number8404
ManufacturerKeystone Electronics
AvailabilityAvailable to order — request a quote
Specifications
NSN5960-00-952-3011 (NSN)
Federal Item NameELECTRON TUBE
Federal Supply Class5960 — Electron Tubes
Tube TypeKLYSTRON
Nondefinitive Spec Std Data8404 TYPE
Contact Maximum Ac Voltage Rating440.0 SINGLE MATING END ALL CONTACT GROUPINGS
Included Contact TypeROUND SOCKET SINGLE MATING END ALL CONTACT GROUPINGS
Contact Maximum Current Rating In30.0 SINGLE MATING END ALL CONTACT GROUPINGS
Contact RemovabilityNONREMOVABLE SINGLE MATING END ALL CONTACT GROUPINGS
Connector Locking MethodBAYONET LATCH
Included Contact Quantity3 SINGLE MATING END SECOND CONTACT GROUPING
Contact Maximum Dc Voltage Rating250.0 SINGLE MATING END ALL CONTACT GROUPINGS
Insert MaterialPLASTIC SINGLE MATING END
Overall Width6.000 INCHES NOMINAL
Shell MaterialIRON
Overall Length5.875 INCHES NOMINAL
ESD/EMICode A — ESD/EMI sensitive item
Nominal Thread Size0.750 INCHES SINGLE END
Inside Diameter0.750 INCHES NOMINAL SINGLE END
Thread DirectionRIGHT-HAND SINGLE END
Style DesignatorSTANDARD
MaterialPLASTIC NYLON
Thread Series DesignatorNPT THIRD END
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 8404 available?
We can source 8404 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 8404 by Keystone Electronics obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 8404 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 8404?
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 8404?
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.