Firstmark Aerospace Corp. · Electronic Components
249278
Holder Assembly, Electrical Conta
Part Number249278
ManufacturerFirstmark Aerospace Corp.
AvailabilityAvailable to order — request a quote
Specifications
NSN5977-00-032-0220 (NSN)
Federal Item NameHOLDER ASSEMBLY,ELECTRICAL CONTA
Federal Supply Class5977 — Electrical Contact Brushes and Electrodes
Brush Quantity Accommodated Per Ho1
Total Brush Quantity Accommodated2
Furnished Items And Quantity2 BRUSH
Features ProvidedBRUSH PRESSURE SPRING
Holder Quantity Per Assembly2
Brush Spring AdjustabilityADJUSTABLE
Brush Pressure Spring Type AccommoHELICAL TORSION
Assembly Grouping PositionCIRCLE
Holder Position AdjustabilityNONADJUSTABLE
Body StyleHOLE MOUNTED
Nonpile Up Contact Arrangement2 POLE, DOUBLE THROW, BOTH POSITIONS MAINTAINED SINGLE SWITCH UNIT
Center To Center Distance Between1.125 INCHES NOMINAL
Mounting MethodUNTHREADED HOLE(S)
Contact Load Current Rating At Max1.000 AMPERES RESISTIVE DC AND 3.000 AMPERES RESISTIVE AC
Actuator Height0.359 INCHES NOMINAL
Actuator Position Action RelationsUP POSITION MAINTAINED AND DOWN POSITION MAINTAINED
MaterialPLASTIC CASE
Unthreaded Mounting Hole Diameter0.136 INCHES NOMINAL
Actuator Width0.200 INCHES NOMINAL
Actuator Length0.312 INCHES NOMINAL
Vendor Part Numbers239643-278
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 249278 available?
We can source 249278 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 249278 by Firstmark Aerospace Corp. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 249278 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 249278?
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 249278?
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.