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LB-B1-4221 — LB-B1-4221

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

LB-B1-4221: LB-B1-4221.

The LB-B1-4221 is a the manufacturer industrial component. Key specifications include color: YELLOW THIRD POSITION COATING SINGLE CONDUCTOR, material: PLASTIC POLYIMIDE AND PLASTIC FLUORINATED ETHYLENE PROPYLENE SECOND POSITION TAPE SINGLE CONDUCTOR, conductor_form: STRANDED SINGLE CONDUCTOR, voltage_rating: 600.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR, special_features: A SINGLE GREEN BAND SHALL BE APPLIED EVERY 2 3/4 INCHES ON BASIC WIRE IN, surface_treatment: NICKEL FOURTH POSITION SHIELD BRAID METALLIC SINGLE CONDUCTOR. This part is cataloged in the U.S.

Government catalog under NSN 6145-01-356-0138, 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
MRO→ MRO_GENERAL→ LB-B1-4221
NSN: 6145-01-356-0138
FSC: 6145 — Wire and Cable, Electrical
CAGE: 28427 — BARCEL/CDT (USA)
SPECIFICATIONS
colorYELLOW THIRD POSITION COATING SINGLE CONDUCTOR
materialPLASTIC POLYIMIDE AND PLASTIC FLUORINATED ETHYLENE PROPYLENE SECOND POSITION TAPE SINGLE CONDUCTOR
conductor_formSTRANDED SINGLE CONDUCTOR
voltage_rating600.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR
special_featuresA SINGLE GREEN BAND SHALL BE APPLIED EVERY 2 3/4 INCHES ON BASIC WIRE IN
surface_treatmentNICKEL FOURTH POSITION SHIELD BRAID METALLIC SINGLE CONDUCTOR
conductor_quantity1
round_conductor_size22 AWG SINGLE CONDUCTOR
cross-sectional_shape_styleROUND
departure_from_cited_documentAS MODIFIED BY OUTER JACKET COLOR AND COLOR BANDS ON BASIC WIRE
strand_awg_size_per_conductor34 SINGLE CONDUCTOR
strand_quantity_per_conductor19 SINGLE CONDUCTOR
NSN6145-01-356-0138
COMPONENT DIAGRAM
WIRE / CABLE — AMPACITY DEPENDS ON INSTALLATION CROSS-SECTION JACKET WIRE SPECIFICATIONS Conductor Size: — Conductor Count: — Voltage Rating: — Insulation: — Temp Rating: — PN: LB-B1-4221 · OEM ⚠ VERIFY BEFORE ORDERING Ampacity depends on installation method — conduit ≠ free air ≠ underground. Same wire, different ratings. AWG sizing is inverse — smaller number = thicker wire (4 AWG > 12 AWG) ✓ BROKER TIP Stranded = flexible routing and vibration resistance. Solid = fixed conduit runs only. THHN/THWN = dual rated — check both dry and wet ampacity tables PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
ROUND CONDUCTOR SIZE: 22 AWG SINGLE CONDUCTOR
•
VOLTAGE RATING: 600.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR
•
CONDUCTOR QUANTITY: 1
•
STRAND AWG SIZE PER CONDUCTOR: 34 SINGLE CONDUCTOR
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B355 ASSN STD SINGLE MATERIAL RESPONSE CORE CONDUCTOR SINGLE CONDUCTOR
•
CROSS-SECTIONAL SHAPE STYLE: ROUND
•
CONDUCTOR FORM: STRANDED SINGLE CONDUCTOR
TECHNICAL CHARACTERISTICS
ROUND CONDUCTOR SIZE22 AWG SINGLE CONDUCTOR
VOLTAGE RATING600.0 MAXIMUM ROOT MEAN SQUARE (RMS) OPERATING VOLTAGE SINGLE CONDUCTOR
CONDUCTOR QUANTITY1
STRAND AWG SIZE PER CONDUCTOR34 SINGLE CONDUCTOR
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B355 ASSN STD SINGLE MATERIAL RESPONSE CORE CONDUCTOR SINGLE CONDUCTOR
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B355 ASSN STD SINGLE MATERIAL RESPONSE FOURTH POSITION SHIELD BRAID METALLIC SINGLE CONDUCTOR
CROSS-SECTIONAL SHAPE STYLEROUND
CONDUCTOR FORMSTRANDED SINGLE CONDUCTOR
DEPARTURE FROM CITED DOCUMENTAS MODIFIED BY OUTER JACKET COLOR AND COLOR BANDS ON BASIC WIRE
STRAND QUANTITY PER CONDUCTOR19 SINGLE CONDUCTOR
OTHER ITEMS IN FSC 6145 — Wire and Cable, Electrical
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6145-00-000-0090 6145-00-000-0095 6145-00-001-1281 6145-00-001-3002 6145-00-001-4504 6145-00-001-5158 6145-00-001-5159 6145-00-001-5160
SUBSTITUTES & CROSS-REFERENCES 4
B1-0061Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
22721/20079KK1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
30-90489/22Reference document
Same NSN cross-reference
Reference document — Design control — primary reference
LE572-0053-4221Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
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 LB-B1-4221?
LB-B1-4221 is a LB-B1-4221. It is classified as a MRO (MRO_GENERAL).
What parts can replace LB-B1-4221?
There are 4 known substitutes for LB-B1-4221: B1-0061, 22721/20079KK1, 30-90489/22 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for LB-B1-4221?
LB-B1-4221 is cataloged in the U.S. Government catalog under NSN 6145-01-356-0138. 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.