Square D · Electronic Components
4031
POLYBLOCK DISTRIBUTION BLOCK 1P
Part Number4031
ManufacturerSquare D
AvailabilityAvailable to order — request a quote
Specifications
NSN5985-00-823-4285 (NSN)
Federal Item NameCOUPLER,DIRECTIONAL
Federal Supply Class5985 — Antennas and Waveguides
Identifying NumberTERMINAL FITTING TYPE NPM
Design TypeUNIDIRECTIONAL
Power Loss In Decibels3.0
Usage DesignMAIN LINE AND SECONDARY LINE TERMINAL FITTING
Unit TypeTRANSMISSION LINE
Terminal Fitting Controlling AgencGOVT AGENCY OR COMMERCIAL ORGANIZATION,ANY ACCEPTABLE
Radio Frequency Rating0.5 GIGAHERTZ MINIMUM AND 1.0 GIGAHERTZ MAXIMUM
Overall Length3.440 INCHES NOMINAL
Overall Height1.380 INCHES NOMINAL
Overall Width0.420 INCHES NOMINAL
Cancelled NSN5985-01-055-9297 (cancelled)
Mounting Facility Type And Quantit10 UNTHREADED HOLE(S) SINGLE MOUNTING FACILITY
ColorNATURAL
MaterialPLASTIC POLYAMIDE NYLON
Overall Diameter0.375 INCHES NOMINAL
Unthreaded Mounting Hole Diameter0.036 INCHES NOMINAL SINGLE MOUNTING FACILITY
Test Data Document81349-MIL-M-38527 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DA
Body StyleDISK
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 4031 available?
We can source 4031 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 4031 by Square D obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 4031 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 4031?
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 4031?
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.