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 5640-01-304-4032 · FSC 5640 · No Item Name Available
Verified by PartsTable
NSN 5640-01-304-4032 — this item is cataloged by the U.S. Government under National Stock Number 5640-01-304-4032. Primary manufacturer part number: MIL-I-24703.
Features
  • Insulation Sleeving,thermal — FSC 5640
  • Flexibility: FLEXIBLE
  • Material: POLYPHOSPHAZENE FOAM LOCATION NOT OTHERWISE SPECIFIED
  • Nondefinitive Spec/std Data: T FORM
  • Length: 72.000 INCHES NOMINAL IN
  • Layer Quantity: 1
  • Design Form: FULL ROUND
  • Inside Diameter: 2.125 INCHES NOMINAL IN
Applications
  • Applications requiring Polyphosphazene Foam Location Not Otherwise Specified construction
General Description

The Insulation Sleeving,thermal, cataloged under National Stock Number 5640-01-304-4032, 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
NSN5640-01-304-4032
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
MaterialPOLYPHOSPHAZENE FOAM LOCATION NOT OTHERWISE SPECIFIED
Nondefinitive Spec/std DataT FORM
Length72.000 INCHES NOMINAL IN
Layer Quantity1
Design FormFULL ROUND
Inside Diameter2.125 INCHES NOMINAL IN
Fabrication MethodEXPANDED
Insulation Thickness0.750 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5915-00-064-2229S183001 INTERCHANGEABLE
Filter,low Pass
Magnetika Inc Div Magnetika/phillipsburg Location
2815-00-146-7418 INTERCHANGEABLE
Crankshaft,engine
7310-00-285-6155 INTERCHANGEABLE
Stove,gasoline Burner
5310-00-505-912168545 INTERCHANGEABLE
Washer,magneto
Textron Lycoming Inc Williamsport Plant
5330-00-770-38656155 INTERCHANGEABLE
Seal,plain Encased
Federal-Mogul Corp Government Sales Dept
5960-00-905-8020 INTERCHANGEABLE
Electron Tube
5120-01-064-1923 INTERCHANGEABLE
Wrench,box and Open End,combinat
5330-01-173-34316155 INTERCHANGEABLE
Gasket
Greno Industries, Inc. Dba Greno Industries Inc
4820-01-275-52056155 INTERCHANGEABLE
Valve,regulating,fluid Pressure
Saylor-Beall Manufacturing Company
5640-01-304-4030 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
6155 Ethyl Corp Commercial Development Div (USA)
MIL-I-24703 FMT General Services Administration Federal Supply Service (USA)
Related Parts
5915-00-064-2229INTERCHANGEABLE
FILTER,LOW PASS
S183001
2815-00-146-7418INTERCHANGEABLE
CRANKSHAFT,ENGINE
7310-00-285-6155INTERCHANGEABLE
STOVE,GASOLINE BURNER
5310-00-505-9121INTERCHANGEABLE
WASHER,MAGNETO
68545
5330-00-770-3865INTERCHANGEABLE
SEAL,PLAIN ENCASED
6155
5960-00-905-8020INTERCHANGEABLE
ELECTRON TUBE
5120-01-064-1923INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
5330-01-173-3431INTERCHANGEABLE
GASKET
6155
4820-01-275-5205INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
6155
5640-01-304-4030INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-304-4031INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-01-304-4033INTERCHANGEABLE
INSULATION SLEEVING,THERMAL

Frequently Asked Questions

What is NSN 5640-01-304-4032?

NSN 5640-01-304-4032 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 5640-01-304-4032?

NSN 5640-01-304-4032 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), 6155 (Ethyl Corp Commercial Development Div), MIL-I-24703 FMT (General Services Administration Federal Supply Service).

What NSN replaces 5640-01-304-4032?

There are 12 known substitutes for 5640-01-304-4032: 5915-00-064-2229, 2815-00-146-7418, 7310-00-285-6155 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; Material: POLYPHOSPHAZENE FOAM LOCATION NOT OTHERWISE SPECIFIED; Nondefinitive Spec/std Data: T FORM; Length: 72.000 INCHES NOMINAL IN. 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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