PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-I-631Insulation Sleeving,electrical

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5970-00-841-6606 · FSC 5970 · No Item Name Available
Verified by PartsTable
NSN 5970-00-841-6606 — this item is cataloged by the U.S. Government under National Stock Number 5970-00-841-6606. Primary manufacturer part number: MIL-I-631.
Features
  • Insulation Sleeving,electrical — FSC 5970
  • Inside Diameter: 0.204 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
  • Reliability Indicator: NOT ESTABLISHED
  • Wall Thickness: 0.017 INCHES MINIMUM AND 0.023 INCHES MAXIMUM IN
  • Flexibility: FLEXIBLE
  • Environmental Protection: HEAT RESISTANT
  • Temp Rating: -10.0 CELSIUS AND 105.0 CELSIUS DEGC
  • Color: CLEAR
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Insulation Sleeving,electrical, cataloged under National Stock Number 5970-00-841-6606, is classified within Federal Supply Class 5970 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 19 commercial cross-references from 12 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5970-00-841-6606
Primary Part NumberMIL-I-631
Item NameInsulation Sleeving,electrical
FSC / FSG5970 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Inside Diameter0.204 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN
Reliability IndicatorNOT ESTABLISHED
Wall Thickness0.017 INCHES MINIMUM AND 0.023 INCHES MAXIMUM IN
FlexibilityFLEXIBLE
Environmental ProtectionHEAT RESISTANT
Temp Rating-10.0 CELSIUS AND 105.0 CELSIUS DEGC
ColorCLEAR
Minimum Tensile Strength1800 POUNDS PER SQUARE INCH LBS
Nondefinitive Spec/std Data1 CATEGORY AND I CLASS AND U FORM AND C GRADE AND 4 AWG SIZE AND UA SUBFORM AND F TYPE
Departure From Cited DocumentAS MOD BY COLOR
Dielectric Material Voltage Rating Per Unit Thickness700.0 VOLTS PER MIL /0.001 INCH/ IN
Style DesignatorNONSHRINKABLE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5970-00-688-9004 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-829-297296216155000 INTERCHANGEABLE
Insulation Sleeving,electrical
Honeywell Intl Inc Defense Avionics Systems
5970-00-845-7243PVC105-8BLACK INTERCHANGEABLE
Insulation Sleeving,electrical
Belden, Inc.
5970-00-889-3844 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-892-0933 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-923-4470 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-926-7311 INTERCHANGEABLE
Insulation Sleeving,electrical
5970-00-998-0290 INTERCHANGEABLE
Insulation Sleeving,electrical
Cross-Reference Index
Part NumberManufacturer
MIL-I-631 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
PYC105-4CLEAR Belden, Inc. (USA)
NATVAR461 High Voltage Engineering Corp Natvar Co Div (USA)
3003 Minnesota Mining and Mfg Co 3m Company (USA)
PVC105-4 Belden, Inc. (USA)
RESINITEHH105C Borden Chemical Co Resinite Dept (USA)
TEMFLEX105 3m Co Admininistrative Electronic & Communications (USA)
TURB0LEX105 Prysmian Cables and Systems Usa, Llc Div Manufacturing Plant (USA)
3003 3m Co Admininistrative Electronic & Communications (USA)
MILI631TYFF0RMUA Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
PVC105-4CLEAR Belden, Inc. (USA)
TEMFLEX105 Minnesota Mining and Mfg Co 3m Company (USA)
3003 3m Company (USA)
TEMFLEX105 3m Company (USA)
MILI631TYPEFFORMUGRCCL1CAT1.208I Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
591-0008-010 The Boeing Company Div Legacy Boeing Hb1 (USA)
44791AB2083UA Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp (USA)
FLEXITEHT105C Markel Corp. (USA)
411634-2110 Raytheon Company Dba Raytheon (USA)
Related Parts
5970-00-688-9004INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-829-2972INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
96216155000
5970-00-845-7243INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
PVC105-8BLACK
5970-00-889-3844INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-892-0933INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-923-4470INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-926-7311INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL
5970-00-998-0290INTERCHANGEABLE
INSULATION SLEEVING,ELECTRICAL

Frequently Asked Questions

What is NSN 5970-00-841-6606?

NSN 5970-00-841-6606 is a Insulation Sleeving,electrical, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5970 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5970-00-841-6606?

NSN 5970-00-841-6606 has 19 cross-referenced part numbers: MIL-I-631 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), PYC105-4CLEAR (Belden, Inc.), NATVAR461 (High Voltage Engineering Corp Natvar Co Div), 3003 (Minnesota Mining and Mfg Co 3m Company), PVC105-4 (Belden, Inc.) and 14 more.

What NSN replaces 5970-00-841-6606?

There are 8 known substitutes for 5970-00-841-6606: 5970-00-688-9004, 5970-00-829-2972, 5970-00-845-7243 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-I-631?

Key specifications for MIL-I-631: Inside Diameter: 0.204 INCHES MINIMUM AND 0.224 INCHES MAXIMUM IN; Reliability Indicator: NOT ESTABLISHED; Wall Thickness: 0.017 INCHES MINIMUM AND 0.023 INCHES MAXIMUM IN; Flexibility: FLEXIBLE. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5970-00-841-6606 still in active supply?

NSN 5970-00-841-6606 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com