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 5640-01-308-0296 · FSC 5640 · No Item Name Available
Verified by PartsTable
NSN 5640-01-308-0296 — this item is cataloged by the U.S. Government under National Stock Number 5640-01-308-0296. Primary manufacturer part number: MIL-I-24703.
Features
  • Insulation Sleeving,thermal — FSC 5640
  • Length: 72.000 INCHES NOMINAL IN
  • Layer Quantity: 1
  • Material: POLYPHOSPHAZENE FOAM LOCATION NOT OTHERWISE SPECIFIED
  • Nondefinitive Spec/std Data: T FORM
  • Insulation Thickness: 0.750 INCHES NOMINAL IN
  • Fabrication Method: EXPANDED
  • Flexibility: FLEXIBLE
Applications
  • Applications requiring Polyphosphazene Foam Location Not Otherwise Specified construction
General Description

The Insulation Sleeving,thermal, cataloged under National Stock Number 5640-01-308-0296, 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
NSN5640-01-308-0296
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
Length72.000 INCHES NOMINAL IN
Layer Quantity1
MaterialPOLYPHOSPHAZENE FOAM LOCATION NOT OTHERWISE SPECIFIED
Nondefinitive Spec/std DataT FORM
Insulation Thickness0.750 INCHES NOMINAL IN
Fabrication MethodEXPANDED
FlexibilityFLEXIBLE
Design FormFULL ROUND
Inside Diameter0.625 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4920-00-215-21726145 INTERCHANGEABLE
Fixture,assembling,
Allison Transmission Inc Dba Allison Transmission, Inc
5330-00-292-0829 INTERCHANGEABLE
Seal,plain Encased
4730-00-336-62786145 INTERCHANGEABLE
Strainer,suction
Crane Pumps & Systems Pft Corp Div Crane Pumps & System Pft Corp.
5342-01-174-34226145 INTERCHANGEABLE
Tie Rod,tensioning,threaded End
Greno Industries, Inc. Dba Greno Industries Inc
5330-01-272-52586145 INTERCHANGEABLE
Seal,plain
Megator Corp
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
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)
6145 Ethyl Corp Commercial Development Div (USA)
Related Parts
4920-00-215-2172INTERCHANGEABLE
FIXTURE,ASSEMBLING,
6145
5330-00-292-0829INTERCHANGEABLE
SEAL,PLAIN ENCASED
4730-00-336-6278INTERCHANGEABLE
STRAINER,SUCTION
6145
5342-01-174-3422INTERCHANGEABLE
TIE ROD,TENSIONING,THREADED END
6145
5330-01-272-5258INTERCHANGEABLE
SEAL,PLAIN
6145
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
5640-01-307-4723INTERCHANGEABLE
INSULATION SLEEVING,THERMAL

Frequently Asked Questions

What is NSN 5640-01-308-0296?

NSN 5640-01-308-0296 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 5640-01-308-0296?

NSN 5640-01-308-0296 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), 6145 (Ethyl Corp Commercial Development Div).

What NSN replaces 5640-01-308-0296?

There are 12 known substitutes for 5640-01-308-0296: 4920-00-215-2172, 5330-00-292-0829, 4730-00-336-6278 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-I-24703?

Key specifications for MIL-I-24703: Length: 72.000 INCHES NOMINAL IN; Layer Quantity: 1; Material: POLYPHOSPHAZENE FOAM LOCATION NOT OTHERWISE SPECIFIED; 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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