Reliance Electric Company · Electronic Components
403959A
Brush, Electrical Contact
Part Number403959A
ManufacturerReliance Electric Company
AvailabilityAvailable to order — request a quote
Specifications
NSN5977-00-296-0490 (NSN)
Federal Item NameBRUSH,ELECTRICAL CONTACT
Federal Supply Class5977 — Electrical Contact Brushes and Electrodes
Peripheral Speed4000 FEET PER MINUTE
Width0.250 INCHES NOMINAL
Length1.250 INCHES NOMINAL
Thickness0.625 INCHES NOMINAL
Top StyleFLAT WITH FRONT EDGE BEVELED
Material Document And ClassificatiNATIONAL GRADE AY MFR REF SINGLE MATERIAL RESPONSE
Shunt Insulation Provision And Qua1 INSULATED
Criticality Code JustificationMATT AND MDCL
Terminal Type And Quantity1 STRAIGHT W/SLOT
Style DesignatorONE PIECE
MaterialELECTROGRAPHITIC
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 403959A available?
We can source 403959A 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 403959A by Reliance Electric Company obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 403959A 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 403959A?
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 403959A?
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.