PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-I-24703Insulation Sleeving,thermal

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5640-01-307-4723 · FSC 5640 · No Item Name Available
Verified by PartsTable
NSN 5640-01-307-4723 — this item is cataloged by the U.S. Government under National Stock Number 5640-01-307-4723. Primary manufacturer part number: MIL-I-24703.
Features
  • Insulation Sleeving,thermal — FSC 5640
  • Flexibility: FLEXIBLE
  • Design Form: FULL ROUND
  • Insulation Thickness: 0.750 INCHES NOMINAL IN
  • Nondefinitive Spec/std Data: T FORM
  • Material: POLYPHOSPHAZENE FOAM LOCATION NOT OTHERWISE SPECIFIED
  • Length: 72.000 INCHES NOMINAL IN
  • Fabrication Method: EXPANDED
Applications
  • Applications requiring Polyphosphazene Foam Location Not Otherwise Specified construction
General Description

The Insulation Sleeving,thermal, cataloged under National Stock Number 5640-01-307-4723, is classified within Federal Supply Class 5640 (No Item Name Available) of the Construction and Building Materials 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 9 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5640-01-307-4723
Primary Part NumberMIL-I-24703
Item NameInsulation Sleeving,thermal
FSC / FSG5640 / 56 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
FlexibilityFLEXIBLE
Design FormFULL ROUND
Insulation Thickness0.750 INCHES NOMINAL IN
Nondefinitive Spec/std DataT FORM
MaterialPOLYPHOSPHAZENE FOAM LOCATION NOT OTHERWISE SPECIFIED
Length72.000 INCHES NOMINAL IN
Fabrication MethodEXPANDED
Inside Diameter1.375 INCHES NOMINAL IN
Layer Quantity1
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5640-01-304-4030 INTERCHANGEABLE
Insulation Sleeving,thermal
5640-01-304-4031 INTERCHANGEABLE
Insulation Sleeving,thermal
5640-01-304-4032 INTERCHANGEABLE
Insulation Sleeving,thermal
5640-01-304-4033 INTERCHANGEABLE
Insulation Sleeving,thermal
5640-01-307-4721 INTERCHANGEABLE
Insulation Sleeving,thermal
5640-01-307-4722 INTERCHANGEABLE
Insulation Sleeving,thermal
5640-01-307-4724 INTERCHANGEABLE
Insulation Sleeving,thermal
5640-01-307-4725 INTERCHANGEABLE
Insulation Sleeving,thermal
5640-01-307-4726 INTERCHANGEABLE
Insulation Sleeving,thermal
5640-01-308-0295 INTERCHANGEABLE
Insulation Sleeving,thermal
Cross-Reference Index
Part NumberManufacturer
MIL-I-24703 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MIL-I-24703 FMT General Services Administration Federal Supply Service (USA)
6151 Ethyl Corp Commercial Development Div (USA)
Related Parts
5640-01-304-4030INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-304-4031INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-304-4032INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-304-4033INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-307-4721INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-307-4722INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-307-4724INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-307-4725INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-307-4726INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-308-0295INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-308-0296INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-308-0297INTERCHANGEABLE
INSULATION SLEEVING,THERMAL

Frequently Asked Questions

What is NSN 5640-01-307-4723?

NSN 5640-01-307-4723 is a Insulation Sleeving,thermal, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5640 (No Item Name Available). Status: active.

What are the part numbers for NSN 5640-01-307-4723?

NSN 5640-01-307-4723 has 3 cross-referenced part numbers: MIL-I-24703 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MIL-I-24703 FMT (General Services Administration Federal Supply Service), 6151 (Ethyl Corp Commercial Development Div).

What NSN replaces 5640-01-307-4723?

There are 12 known substitutes for 5640-01-307-4723: 5640-01-304-4030, 5640-01-304-4031, 5640-01-304-4032 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-I-24703?

Key specifications for MIL-I-24703: Flexibility: FLEXIBLE; Design Form: FULL ROUND; Insulation Thickness: 0.750 INCHES NOMINAL IN; Nondefinitive Spec/std Data: T FORM. 10 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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