Miraj · Electronic Components
M-A4-157
Brush, Electrical Contact
Part NumberM-A4-157
ManufacturerMiraj
AvailabilityAvailable to order — request a quote
Specifications
NSN5977-00-165-0794 (NSN)
Federal Item NameBRUSH,ELECTRICAL CONTACT
Federal Supply Class5977 — Electrical Contact Brushes and Electrodes
Radius0.438 INCHES NOMINAL
Style DesignatorONE PIECE
Top StyleFLAT WITH RECTANGULAR SLOT
Slot Depth0.062 INCHES NOMINAL
Shunt Insulation Provision And Qua1 UNINSULATED
MaterialELECTROGRAPHITIC
Terminal Type And Quantity1 STRAIGHT W/HOLE
Material Document And ClassificatiSTACKPOLE CARBON GRADE 43D MFR REF SINGLE MATERIAL RESPONSE
Thickness0.308 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
Brush Shunt Length1.125 INCHES NOMINAL SINGLE SHUNT
Terminal Hole Diameter0.139 INCHES MINIMUM AND 0.143 INCHES MAXIMUM
Vendor Part NumbersA4-157
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 M-A4-157 available?
We can source M-A4-157 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 M-A4-157 by Miraj obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If M-A4-157 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 M-A4-157?
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 M-A4-157?
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.