PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-I-24703 FMTInsulation Sleeving,thermal

General Services Administration Federal Supply Service · NSN 5640-01-304-4033 · FSC 5640 · No Item Name Available
Verified by PartsTable
NSN 5640-01-304-4033 — this item is cataloged by the U.S. Government under National Stock Number 5640-01-304-4033. Primary manufacturer part number: MIL-I-24703 FMT.
Features
  • Insulation Sleeving,thermal — FSC 5640
  • Length: 72.000 INCHES NOMINAL IN
  • Inside Diameter: 2.125 INCHES NOMINAL IN
  • Nondefinitive Spec/std Data: T FORM
  • Material: POLYPHOSPHAZENE FOAM LOCATION NOT OTHERWISE SPECIFIED
  • Flexibility: FLEXIBLE
  • Fabrication Method: EXPANDED
  • Insulation Thickness: 0.500 INCHES NOMINAL IN
Applications
  • Applications requiring Polyphosphazene Foam Location Not Otherwise Specified construction
General Description

The Insulation Sleeving,thermal, cataloged under National Stock Number 5640-01-304-4033, is classified within Federal Supply Class 5640 (No Item Name Available) of the Construction and Building Materials group. The primary manufacturer of record is General Services Administration Federal Supply Service. 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
NSN5640-01-304-4033
Primary Part NumberMIL-I-24703 FMT
Item NameInsulation Sleeving,thermal
FSC / FSG5640 / 56 — No Item Name Available
ManufacturerGeneral Services Administration Federal Supply Service
StatusACTIVE
Length72.000 INCHES NOMINAL IN
Inside Diameter2.125 INCHES NOMINAL IN
Nondefinitive Spec/std DataT FORM
MaterialPOLYPHOSPHAZENE FOAM LOCATION NOT OTHERWISE SPECIFIED
FlexibilityFLEXIBLE
Fabrication MethodEXPANDED
Insulation Thickness0.500 INCHES NOMINAL IN
Layer Quantity1
Design FormFULL ROUND
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
6625-00-086-99986154 INTERCHANGEABLE
Wattmeter
Bird Electronic Corporation Div Bird Electronic Corp
6210-00-299-4104 INTERCHANGEABLE
Light,indicator
5330-00-328-17886154 INTERCHANGEABLE
Gasket
Meggitt North Hollywood Inc
6105-00-420-61762K5354Y14 INTERCHANGEABLE
Motor,alternating Current
General Electric Co Armament and Electrical Systems Dept Electrical Systems Products Dept
5950-00-482-3743 INTERCHANGEABLE
Coil,radio Frequency
3030-00-587-48686154 INTERCHANGEABLE
Belt,v
Gates Corporation
6650-01-004-16256154 INTERCHANGEABLE
Borescope
Lenox Instrument Co., Inc.
4820-01-023-99056154-3 INTERCHANGEABLE
Valve,calibrated Flow
Pneudraulics, Inc.
4820-01-028-19446154-1 INTERCHANGEABLE
Valve,calibrated Flow
Pneudraulics, Inc.
5120-01-064-1922 INTERCHANGEABLE
Wrench,box and Open End,combinat
Cross-Reference Index
Part NumberManufacturer
MIL-I-24703 FMT General Services Administration Federal Supply Service (USA)
MIL-I-24703 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
6154 Ethyl Corp Commercial Development Div (USA)
Related Parts
6625-00-086-9998INTERCHANGEABLE
WATTMETER
6154
6210-00-299-4104INTERCHANGEABLE
LIGHT,INDICATOR
5330-00-328-1788INTERCHANGEABLE
GASKET
6154
6105-00-420-6176INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
2K5354Y14
5950-00-482-3743INTERCHANGEABLE
COIL,RADIO FREQUENCY
3030-00-587-4868INTERCHANGEABLE
BELT,V
6154
6650-01-004-1625INTERCHANGEABLE
BORESCOPE
6154
4820-01-023-9905INTERCHANGEABLE
VALVE,CALIBRATED FLOW
6154-3
4820-01-028-1944INTERCHANGEABLE
VALVE,CALIBRATED FLOW
6154-1
5120-01-064-1922INTERCHANGEABLE
WRENCH,BOX AND OPEN END,COMBINAT
5945-01-102-1166INTERCHANGEABLE
RELAY,SOLID STATE
3168730-1
6105-01-142-3758INTERCHANGEABLE
MOTOR,ALTERNATING CURRENT
6154

Frequently Asked Questions

What is NSN 5640-01-304-4033?

NSN 5640-01-304-4033 is a Insulation Sleeving,thermal, manufactured by General Services Administration Federal Supply Service, classified under FSC 5640 (No Item Name Available). Status: active.

What are the part numbers for NSN 5640-01-304-4033?

NSN 5640-01-304-4033 has 3 cross-referenced part numbers: MIL-I-24703 FMT (General Services Administration Federal Supply Service), MIL-I-24703 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 6154 (Ethyl Corp Commercial Development Div).

What NSN replaces 5640-01-304-4033?

There are 12 known substitutes for 5640-01-304-4033: 6625-00-086-9998, 6210-00-299-4104, 5330-00-328-1788 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-I-24703 FMT?

Key specifications for MIL-I-24703 FMT: Length: 72.000 INCHES NOMINAL IN; Inside Diameter: 2.125 INCHES NOMINAL IN; Nondefinitive Spec/std Data: T FORM; Material: POLYPHOSPHAZENE FOAM LOCATION NOT OTHERWISE SPECIFIED. 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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