PartsTable TECHNICAL DATA SHEET

NSN 5977-00-378-8566Government record, cited

Brush, Electrical Contact5977-00-378-8566

NSN 5977-00-378-8566 · NIIN 003788566

FSC 5977 — Electrical Contact Brushes and Electrodes · FSG 59 — Electrical and Electronic Equipment Components

Government record, cited

Also searched as 5977-00-378-8566 · 5977003788566 · NIIN 003788566 · 00-378-8566 · FSC 5977 Electrical Contact Brushes and Electrodes · 2-1334 · ASB12050

Nearby stock numbers ← 5977-00-378-8563 · 5977-00-378-8567 →

Features

Brush,electrical Contact — FSC 5977
Length: 0.281 INCHES NOMINAL IN
Peripheral Speed: 6000 FEET PER MINUTE FT
Terminal Diameter: 0.260 INCHES NOMINAL IN
Largest Outside Diameter: 0.174 INCHES NOMINAL IN
Body Style: RECTANGULAR COMMUTATOR
Radius: 0.297 INCHES NOMINAL IN
Top Style: CYLINDRICAL HEAD

Identification

NSN: 5977-00-378-8566
NIIN: 003788566
FSC: 5977 — Electrical Contact Brushes and Electrodes
FSG: 59 — Electrical and Electronic Equipment Components

General Description

The Brush,electrical Contact, cataloged under National Stock Number 5977-00-378-8566, is classified within Federal Supply Class 5977 (Electrical Contact Brushes and Electrodes) of the Electrical and Electronic Equipment Components group. Government technical data includes 21 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 7 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	5977-00-378-8566
Item Name	Brush,electrical Contact
FSC / FSG	5977 / 59 — Electrical Contact Brushes and Electrodes
Status	ACTIVE
Length	0.281 INCHES NOMINAL IN
Peripheral Speed	6000 FEET PER MINUTE FT
Terminal Diameter	0.260 INCHES NOMINAL IN
Largest Outside Diameter	0.174 INCHES NOMINAL IN
Body Style	RECTANGULAR COMMUTATOR
Radius	0.297 INCHES NOMINAL IN
Top Style	CYLINDRICAL HEAD
Shunt Position Designator	5
Style Designator	ONE PIECE
Material Document and Classification	PURE CARBON CO INC,GR -30A MFR REF SINGLE MATERIAL RESPONSE A
Spring Free Length	0.516 INCHES NOMINAL IN
Pressure Spring Type and Quantity	1 CYLINDRICAL
Head Length	0.062 INCHES NOMINAL IN
Brush Shunt Length	0.516 INCHES NOMINAL SINGLE SHUNT IN
Contact Face Style	CONCAVE
Shunt Insulation Provision and Quantity	1 UNINSULATED
Width	0.183 INCHES NOMINAL IN
Material	COPPER GRAPHITE
Terminal Type and Quantity	1 ROUND CAP
Thickness	0.183 INCHES NOMINAL IN
Head Diameter	0.165 INCHES NOMINAL IN

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

⇄ Related Items 7

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

5945-00-490-01307012MD POSSIBLE MATCH

RELAY,ELECTROMAGNETIC

Possible match (shared part number)Te Connectivity Corporation

5950-00-645-87192133-4 POSSIBLE MATCH

TRANSFORMER,POWER

Possible match (shared part number)Electronic Transformer Corp Div Electronic Transformer Corporation

4720-01-326-901821334 POSSIBLE MATCH

HOSE,PREFORMED

Possible match (shared part number)Gates Corporation

5998-01-371-481221334 POSSIBLE MATCH

CIRCUIT CARD ASSEMBLY

Possible match (shared part number)Anritsu Instruments Company Div Mbu

4730-01-415-741721317-1018-22 POSSIBLE MATCH

RESTRICTOR,FLUID FLOW

Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace

4730-01-416-967921317-1018-20 POSSIBLE MATCH

RESTRICTOR,FLUID FLOW

Possible match (shared part number)Sargent Aerospace & Defense, Llc Dba Sargent Controls & Aerospace Div Sargent Controls & Aerospace

3940-01-619-580821-334 POSSIBLE MATCH

SLING,ENDLESS

Possible match (shared part number)Hii Unmanned Systems, Inc

Cross-Reference Index

No manufacturer part numbers on file in the U.S. Government catalog.

Reference documents

Reference	Meaning
2-1334	5/9 Secondary reference Keeney J H and Co Inc
ASB12050	3/9 Design control — primary reference Pincor Power Corp

Related Parts

5945-00-490-0130POSSIBLE MATCH

RELAY,ELECTROMAGNETIC

7012MD

5950-00-645-8719POSSIBLE MATCH

TRANSFORMER,POWER

2133-4

4720-01-326-9018POSSIBLE MATCH

HOSE,PREFORMED

21334

5998-01-371-4812POSSIBLE MATCH

CIRCUIT CARD ASSEMBLY

21334

4730-01-415-7417POSSIBLE MATCH

RESTRICTOR,FLUID FLOW

21317-1018-22

4730-01-416-9679POSSIBLE MATCH

RESTRICTOR,FLUID FLOW

21317-1018-20

3940-01-619-5808POSSIBLE MATCH

SLING,ENDLESS

21-334

Frequently Asked Questions

What is NSN 5977-00-378-8566?

NSN 5977-00-378-8566 is a Brush,electrical Contact, classified under FSC 5977, Electrical Contact Brushes and Electrodes. Status: active.

What NSN replaces 5977-00-378-8566?

7 possible matches (shared part number, not a government interchangeability claim): 5945-00-490-0130, 5950-00-645-8719, 4720-01-326-9018. Verify interchangeability with system specifications before substitution.

What are the specifications of 5977-00-378-8566?

Key specifications for 5977-00-378-8566: Length: 0.281 INCHES NOMINAL IN; Peripheral Speed: 6000 FEET PER MINUTE FT; Terminal Diameter: 0.260 INCHES NOMINAL IN; Largest Outside Diameter: 0.174 INCHES NOMINAL IN. 21 specifications are documented in the U.S. Government catalog.

Is NSN 5977-00-378-8566 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.

U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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