Peerless Instrument · Electronic Components
031B557
Brush, Electrical Contact
Part Number031B557
ManufacturerPeerless Instrument
AvailabilityAvailable to order — request a quote
Specifications
NSN5977-00-782-0346 (NSN)
Federal Item NameBRUSH,ELECTRICAL CONTACT
Federal Supply Class5977 — Electrical Contact Brushes and Electrodes
Body StyleRECTANGULAR COMMUTATOR
Thickness0.375 INCHES NOMINAL
Shunt Position Designator12
Length0.562 INCHES NOMINAL
MaterialSILVER GRAPHITE
Precious Material And LocationBRUSH SILVER
Precious MaterialSILVER
Material Document And ClassificatiSUPERIOR CARBON GRADE 2C MFR REF SINGLE MATERIAL RESPONSE
Style DesignatorONE PIECE
Precious Material And Weight0.040 SILVER GRAINS, TROY
Shunt Insulation Provision And Qua1 UNINSULATED
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 031B557 available?
We can source 031B557 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 031B557 by Peerless Instrument obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 031B557 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 031B557?
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 031B557?
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.