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Technical Data Sheet
PartsTable / MRO / 181-20
181-20 ✓ Verified by PartsTable
Clementoni · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Stranded for flexible routing, solid for conduit THHN/THWN dual-rated — check both tables
Ampacity depends on installation method
PRODUCT OVERVIEW

The RESISTOR,FIXED,WIRE WOUND is a Clementoni industrial component. Key specifications include material: STEEL OVERALL, overall_length: 6.000 INCHES NOMINAL IN, special_features: ON AT 40 DEGREES F, OFF AT 55 DEGREES F; CONTACT OPENS ON TEMPERATURE RISE, style_designator: L-HANDLE, features_provided: BALL END, surface_treatment: OXIDE OVERALL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6145-01-333-4611, 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→ 181-20
NSN: 6145-01-333-4611
FSC: 6145
CAGE: 56501 — ABB INSTALLATION PRODUCTS INC (USA)
SPECIFICATIONS
materialSTEEL OVERALL
overall_length6.000 INCHES NOMINAL IN
special_featuresON AT 40 DEGREES F, OFF AT 55 DEGREES F; CONTACT OPENS ON TEMPERATURE RISE
style_designatorL-HANDLE
features_providedBALL END
surface_treatmentOXIDE OVERALL
wrenching_surface_size0.313 INCHES NOMINAL BOTH ENDS IN
end_item_identificationMOTOR 5HP, LIGHT WEIGHT EP-130 ELECTRIC PISTON HORN
wrenching_surface_shapeHEXAGON BOTH ENDS EXTERNAL
specification/standard_data05047-ASME B18.3 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
part_name_assigned_by_controlling_agencyA10 BATTERY BOARD PSD90-IM
NSN6145-01-333-4611
COMPONENT DIAGRAM
WIRE / CABLE — AMPACITY DEPENDS ON INSTALLATION CROSS-SECTION JACKET WIRE SPECIFICATIONS Conductor Size: — Conductor Count: — Voltage Rating: — Insulation: — Temp Rating: — PN: 181-20 · Clementoni ⚠ 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
•
CONDUCTOR ARRANGEMENT AND QUANTITY: 20 TWISTED TOGETHER W/NO OUTER COVERING
•
PRECIOUS MATERIAL AND LOCATION: SURFACE ALL CONDUCTORS SILVER
•
STRAND QUANTITY PER CONDUCTOR: 7 ALL CONDUCTORS
•
CONDUCTOR QUANTITY: 20
•
MATERIAL DOCUMENT AND CLASSIFICATION: ASTM B298 ASSN STD SINGLE MATERIAL RESPONSE CORE CONDUCTOR ALL CONDUCTORS
•
MATERIAL: COPPER ALLOY CORE CONDUCTOR ALL CONDUCTORS
•
CONDUCTOR FORM: STRANDED ALL CONDUCTORS
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B298 ASSN STD SINGLE TREATMENT RESPONSE CORE CONDUCTOR ALL CONDUCTORS
TECHNICAL CHARACTERISTICS (FLIS)
CONDUCTOR ARRANGEMENT AND QUANTITY20 TWISTED TOGETHER W/NO OUTER COVERING
PRECIOUS MATERIAL AND LOCATIONSURFACE ALL CONDUCTORS SILVER
STRAND QUANTITY PER CONDUCTOR7 ALL CONDUCTORS
CONDUCTOR QUANTITY20
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B298 ASSN STD SINGLE MATERIAL RESPONSE CORE CONDUCTOR ALL CONDUCTORS
MATERIALCOPPER ALLOY CORE CONDUCTOR ALL CONDUCTORS
CONDUCTOR FORMSTRANDED ALL CONDUCTORS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTM B298 ASSN STD SINGLE TREATMENT RESPONSE CORE CONDUCTOR ALL CONDUCTORS
STRAND AWG SIZE PER CONDUCTOR36 ALL CONDUCTORS
MATERIALPLASTIC POLYTETRAFLUOROETHYLENE ELEVENTH POSITION CONDUCTOR ALL CONDUCTORS
VERIFIED SUBSTITUTES & CROSS-REFERENCES 19
MIL-C-49055/12Upgraded Successor
successor cross-reference
successor
M49055/12-12JUpgraded Successor
successor cross-reference
successor
MIL-DTL-49055/12Upgraded Successor
successor cross-reference
successor
20-6772-00Upgraded Successor
successor cross-reference
successor
18120Upgraded Successor
successor cross-reference
successor
5998PL1147447Upgraded Successor
successor cross-reference
successor
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 181-20?
181-20 is a RESISTOR,FIXED,WIRE WOUND manufactured by Clementoni. It is classified as a MRO (MRO_GENERAL).
What parts can replace 181-20?
There are 19 known substitutes for 181-20: MIL-C-49055/12, M49055/12-12J, MIL-DTL-49055/12 and 16 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 181-20?
181-20 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6145-01-333-4611. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026