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BYLM258 — BRUSH,ELECTRICAL CONTACT

✓ Government record, cited
— · COMPONENT
PRODUCT OVERVIEW

BYLM258: BRUSH,ELECTRICAL CONTACT.

The BRUSH,ELECTRICAL CONTACT is a the manufacturer industrial component. Key specifications include radius: 0.300 INCHES NOMINAL IN, top_style: CYLINDRICAL HEAD, body_style: RECTANGULAR COMMUTATOR, style_designator: ONE PIECE, brush_shunt_length: 0.532 INCHES NOMINAL SINGLE SHUNT IN, contact_face_style: CONVEX. This part is cataloged in the U.S.

Government catalog under NSN 5977-01-020-4220, 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
BYLM258
NSN: 5977-01-020-4220
FSC: 5977 — Electrical Contact Brushes and Electrodes
CAGE: 05624 — GE AVIATION SYSTEMS LLC DBA GE AVIATION SYSTEMS LLC (USA)
SPECIFICATIONS
radius0.300 INCHES NOMINAL IN
top_styleCYLINDRICAL HEAD
body_styleRECTANGULAR COMMUTATOR
style_designatorONE PIECE
brush_shunt_length0.532 INCHES NOMINAL SINGLE SHUNT IN
contact_face_styleCONVEX
spring_free_length0.688 INCHES NOMINAL IN
largest_outside_diameter0.185 INCHES NOMINAL IN
shunt_position_designator5
pressure_spring_type_and_quantity1 CYLINDRICAL
shunt_insulation_provision_and_quantity1 UNINSULATED
NSN5977-01-020-4220
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available BRUSH,ELECTRICAL CONTACT TITLE COMPONENT PN BYLM258 MFR BRUSH,ELECTRICAL CONTA
KEY FEATURES
•
LARGEST OUTSIDE DIAMETER: 0.185 INCHES NOMINAL IN
•
BODY STYLE: RECTANGULAR COMMUTATOR
•
RADIUS: 0.300 INCHES NOMINAL IN
•
TOP STYLE: CYLINDRICAL HEAD
•
SHUNT POSITION DESIGNATOR: 5
•
STYLE DESIGNATOR: ONE PIECE
•
SPRING FREE LENGTH: 0.688 INCHES NOMINAL IN
•
PRESSURE SPRING TYPE AND QUANTITY: 1 CYLINDRICAL
TECHNICAL CHARACTERISTICS
LARGEST OUTSIDE DIAMETER0.185 INCHES NOMINAL IN
BODY STYLERECTANGULAR COMMUTATOR
RADIUS0.300 INCHES NOMINAL IN
TOP STYLECYLINDRICAL HEAD
SHUNT POSITION DESIGNATOR5
STYLE DESIGNATORONE PIECE
SPRING FREE LENGTH0.688 INCHES NOMINAL IN
PRESSURE SPRING TYPE AND QUANTITY1 CYLINDRICAL
BRUSH SHUNT LENGTH0.532 INCHES NOMINAL SINGLE SHUNT IN
CONTACT FACE STYLECONVEX
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
No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is BYLM258?
BYLM258 is a BRUSH,ELECTRICAL CONTACT.
What is the NSN for BYLM258?
BYLM258 is cataloged in the U.S. Government catalog under NSN 5977-01-020-4220. 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.