Almon Johnson · Electronic Components
A256-1890
Contact, Electrical
Part NumberA256-1890
ManufacturerAlmon Johnson
AvailabilityAvailable to order — request a quote
Specifications
NSN5999-00-139-2823 (NSN)
Federal Item NameCONTACT,ELECTRICAL
Federal Supply Class5999 — Miscellaneous Electrical Components
Overall Length1.688 INCHES NOMINAL
Overall Height1.563 INCHES NOMINAL
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Style DesignatorRECTANGULAR SHAPE
MaterialCOPPER ALLOY CONTACT
Surface TreatmentZINC BODY AND CONTACT
Terminal Type And Quantity1 THREADED STUD AXIALLY AT ONE END
Mounting Facility Quantity1
Thread Class2B
Thread Quantity Per Inch32
Thread DirectionRIGHT-HAND
ESD/EMICode A — ESD/EMI sensitive item
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 A256-1890 available?
We can source A256-1890 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 A256-1890 by Almon Johnson obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If A256-1890 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 A256-1890?
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 A256-1890?
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.