Telephone Company Of America Incorporated · Electronic Components
21821
Contact, Electrical
Part Number21821
ManufacturerTelephone Company Of America Incorporated
AvailabilityAvailable to order — request a quote
Specifications
NSN5999-00-378-5595 (NSN)
Federal Item NameCONTACT,ELECTRICAL
Federal Supply Class5999 — Miscellaneous Electrical Components
Nominal Thread Size0.138 INCHES
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Terminal Type And Quantity1 THREADED STUD MOUNTING END
MaterialPLASTIC FURANE BODY
Surface TreatmentSILVER CONTACT
Precious Material And LocationCONTACT SURFACE SILVER
Precious MaterialSILVER
Style DesignatorCYLINDRICAL SHAPE
Precious Material And Weight0.005 SILVER GRAINS, TROY
Mounting MethodTHREADED STUD(S)
Overall Diameter0.563 INCHES NOMINAL
ESD/EMICode A — ESD/EMI sensitive item
Circuit ResonanceANTIRESONANCE
Center To Center Distance Between0.192 INCHES NOMINAL
Operating Temp Range-40.0 TO 85.0 CELSIUS
Overall Width0.435 INCHES MAXIMUM
Body Thickness0.150 INCHES MAXIMUM
Body Width0.391 INCHES MAXIMUM
Overall Thickness0.183 INCHES MAXIMUM
Specified Frequency4.000 MEGAHERTZ
Terminal Length0.220 INCHES MINIMUM
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 21821 available?
We can source 21821 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 21821 by Telephone Company Of America Incorporated obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 21821 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 21821?
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 21821?
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.