Meltric Corporation · Electronic Components
MB31
Junction Box
Part NumberMB31
ManufacturerMeltric Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5975-01-529-1525 (NSN)
Federal Item NameJUNCTION BOX
Federal Supply Class5975 — Electrical Hardware and Supplies
MaterialALUMINUM OVERALL
Entrance Quantity1
Surface Treatment Document And ClaDUPONT P/N: PFH50955, ASA-41 P GRAY OR EQUIVALENT MFR REF SINGLE TREATMENT RESPONSE OVERALL
Inside Depth2.500 INCHES NOMINAL
Body Length4.500 INCHES NOMINAL
Entrance Diameter1.156 INCHES ONE SIDE
Surface TreatmentPOWDER COATED OVERALL
Body Width3.000 INCHES NOMINAL
Style DesignatorRECTANGULAR-SQUARE CORNER BOX
Cover Attachment MethodSCREW
Cover Mounting Hole Quantity4
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 MB31 available?
We can source MB31 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 MB31 by Meltric Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If MB31 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 MB31?
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 MB31?
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.