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PD-4977 — BRUSH,ELECTRICAL CONTACT

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

PD-4977: BRUSH,ELECTRICAL CONTACT.

The BRUSH,ELECTRICAL CONTACT is a the manufacturer industrial component. Key specifications include width: 1.485 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN, length: 2.250 INCHES NOMINAL IN, material: ELECTROGRAPHITIC, thickness: 0.746 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN, top_style: FLAT, body_style: RECTANGULAR COMMUTATOR. This part is cataloged in the U.S.

Government catalog under NSN 5977-00-417-3311, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
PD-4977
NSN: 5977-00-417-3311
FSC: 5977 — Electrical Contact Brushes and Electrodes
CAGE: 78429 — CARBON/GRAPHITE GROUP INC THE (USA)
SPECIFICATIONS
width1.485 INCHES MINIMUM AND 1.500 INCHES MAXIMUM IN
length2.250 INCHES NOMINAL IN
materialELECTROGRAPHITIC
thickness0.746 INCHES MINIMUM AND 0.750 INCHES MAXIMUM IN
top_styleFLAT
body_styleRECTANGULAR COMMUTATOR
style_designatorONE PIECE
brush_shunt_length4.500 INCHES NOMINAL SINGLE SHUNT IN
contact_face_styleFLAT
terminal_slot_width0.281 INCHES NOMINAL IN
shunt_position_designator2
terminal_type_and_quantity1 STRAIGHT W/SLOT
NSN5977-00-417-3311
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BRUSH,ELECTRICAL CONTACT TITLE COMPONENT PN PD-4977 MFR BRUSH,ELECTRICAL CONTA
KEY FEATURES
•
LENGTH: 2.250 INCHES NOMINAL IN
•
BODY STYLE: RECTANGULAR COMMUTATOR
•
TERMINAL SLOT WIDTH: 0.281 INCHES NOMINAL IN
•
TOP STYLE: FLAT
•
SHUNT POSITION DESIGNATOR: 2
•
STYLE DESIGNATOR: ONE PIECE
•
MATERIAL DOCUMENT AND CLASSIFICATION: HELWIS CARBON GRADE E36 MFR REF SINGLE MATERIAL RESPONSE
•
BRUSH SHUNT LENGTH: 4.500 INCHES NOMINAL SINGLE SHUNT IN
TECHNICAL CHARACTERISTICS
LENGTH2.250 INCHES NOMINAL IN
BODY STYLERECTANGULAR COMMUTATOR
TERMINAL SLOT WIDTH0.281 INCHES NOMINAL IN
TOP STYLEFLAT
SHUNT POSITION DESIGNATOR2
STYLE DESIGNATORONE PIECE
MATERIAL DOCUMENT AND CLASSIFICATIONHELWIS CARBON GRADE E36 MFR REF SINGLE MATERIAL RESPONSE
BRUSH SHUNT LENGTH4.500 INCHES NOMINAL SINGLE SHUNT IN
CONTACT FACE STYLEFLAT
SHUNT INSULATION PROVISION AND QUANTITY1 UNINSULATED
OTHER ITEMS IN FSC 5977 — Electrical Contact Brushes and Electrodes
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
5977-00-001-8018 5977-00-001-8867 5977-00-002-9654 5977-00-003-0257 5977-00-003-0258 5977-00-003-0264 5977-00-003-1196 5977-00-003-1197
SUBSTITUTES & CROSS-REFERENCES

No substitute or cross-reference records for this part.

LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is PD-4977?
PD-4977 is a BRUSH,ELECTRICAL CONTACT.
What is the NSN for PD-4977?
PD-4977 is cataloged in the U.S. Government catalog under NSN 5977-00-417-3311. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.