Phoenix Electric Mfg Co · Electronic Components
557
Holder, Electrical Contact Brush
Part Number557
ManufacturerPhoenix Electric Mfg Co
AvailabilityAvailable to order — request a quote
Specifications
NSN5977-00-038-3128 (NSN)
Federal Item NameHOLDER,ELECTRICAL CONTACT BRUSH
Federal Supply Class5977 — Electrical Contact Brushes and Electrodes
Inside Width0.437 INCHES MINIMUM AND 0.439 INCHES MAXIMUM
Top Thread LocationINTERNAL
Inside Thickness0.403 INCHES NOMINAL
Thread Size And Series Type Design0.625-27 UNS
Brush Quantity Accommodated Per Ho1
Mounting FacilityTHREADED HOLES
Thread Length0.250 INCHES NOMINAL
Overall Diameter1.500 INCHES NOMINAL
Mounting Facility Quantity2
Inside Length1.937 INCHES NOMINAL
Overall Length1.937 INCHES NOMINAL
Cancelled NSN5977-00-518-0678 (cancelled)
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 557 available?
We can source 557 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 557 by Phoenix Electric Mfg Co obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 557 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 557?
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 557?
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.