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PD-4556 — BRUSH,ELECTRICAL CONTACT

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

PD-4556: BRUSH,ELECTRICAL CONTACT.

The BRUSH,ELECTRICAL CONTACT is a the manufacturer industrial component. Key specifications include width: 1.745 INCHES NOMINAL IN, length: 2.000 INCHES NOMINAL IN, material: CARBON, clip_type: NEMA HAMMER TYPE A, thickness: 0.622 INCHES NOMINAL IN, top_style: FLAT. This part is cataloged in the U.S.

Government catalog under NSN 5977-00-366-1583, 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-4556
NSN: 5977-00-366-1583
FSC: 5977 — Electrical Contact Brushes and Electrodes
CAGE: 78429 — CARBON/GRAPHITE GROUP INC THE (USA)
SPECIFICATIONS
width1.745 INCHES NOMINAL IN
length2.000 INCHES NOMINAL IN
materialCARBON
clip_typeNEMA HAMMER TYPE A
thickness0.622 INCHES NOMINAL IN
top_styleFLAT
body_styleRECTANGULAR COMMUTATOR
style_designatorSPLIT
brush_shunt_length4.000 INCHES NOMINAL ALL SHUNTS IN
contact_face_styleFLAT
terminal_bend_angle30.0 DEGREES NOMINAL
terminal_slot_width0.218 INCHES NOMINAL IN
NSN5977-00-366-1583
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BRUSH,ELECTRICAL CONTACT TITLE COMPONENT PN PD-4556 MFR BRUSH,ELECTRICAL CONTA
KEY FEATURES
•
LENGTH: 2.000 INCHES NOMINAL IN
•
BODY STYLE: RECTANGULAR COMMUTATOR
•
TERMINAL SLOT WIDTH: 0.218 INCHES NOMINAL IN
•
TOP STYLE: FLAT
•
SHUNT POSITION DESIGNATOR: 2
•
CLIP TYPE: NEMA HAMMER TYPE A
•
STYLE DESIGNATOR: SPLIT
•
MATERIAL DOCUMENT AND CLASSIFICATION: HELWIG GRADE H45 MFR REF SINGLE MATERIAL RESPONSE
TECHNICAL CHARACTERISTICS
LENGTH2.000 INCHES NOMINAL IN
BODY STYLERECTANGULAR COMMUTATOR
TERMINAL SLOT WIDTH0.218 INCHES NOMINAL IN
TOP STYLEFLAT
SHUNT POSITION DESIGNATOR2
CLIP TYPENEMA HAMMER TYPE A
STYLE DESIGNATORSPLIT
MATERIAL DOCUMENT AND CLASSIFICATIONHELWIG GRADE H45 MFR REF SINGLE MATERIAL RESPONSE
BRUSH SHUNT LENGTH4.000 INCHES NOMINAL ALL SHUNTS IN
CONTACT FACE STYLEFLAT
SUBSTITUTES & CROSS-REFERENCES 2
8820265Reference document
Same NSN cross-reference
Reference document — Secondary reference
PD4346Reference document
Same NSN cross-reference
Reference document — Secondary reference
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-4556?
PD-4556 is a BRUSH,ELECTRICAL CONTACT.
What parts can replace PD-4556?
There are 2 known substitutes for PD-4556: 8820265, PD4346. Substitute compatibility should be verified for your specific system.
What is the NSN for PD-4556?
PD-4556 is cataloged in the U.S. Government catalog under NSN 5977-00-366-1583. 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.