PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

ASTM C612Insulation Board,thermal

American Society for Testing and Materials Dba Astm International · NSN 5640-00-079-3360 · FSC 5640 · No Item Name Available
Verified by PartsTable
NSN 5640-00-079-3360 — this item is cataloged by the U.S. Government under National Stock Number 5640-00-079-3360. Primary manufacturer part number: ASTM C612.
Features
  • Insulation Board,thermal — FSC 5640
  • Coverage Width: 24.000 INCHES NOMINAL IN
  • Material: MINERAL FIBER LOCATION NOT OTHERWISE SPECIFIED
  • Departure From Cited Designator: AS MODIFIED BY TEMP RATING
  • Nondefinitive Spec/std Data: 1 CLASS
  • Water Repellent Coated Surface: NOT PROVIDED
  • Coverage Length: 48.000 INCHES NOMINAL IN
  • Maximum Thermal Conductivity: 0.25 AT 50 DEG. F MEAN TEMP.
Applications
  • Applications requiring Mineral Fiber Location Not Otherwise Specified construction
General Description

The Insulation Board,thermal, cataloged under National Stock Number 5640-00-079-3360, is classified within Federal Supply Class 5640 (No Item Name Available) of the Construction and Building Materials group. The primary manufacturer of record is American Society for Testing and Materials Dba Astm International. Government technical data includes 14 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: Cancelled.

Technical Specifications
ParameterValue
NSN5640-00-079-3360
Primary Part NumberASTM C612
Item NameInsulation Board,thermal
FSC / FSG5640 / 56 — No Item Name Available
ManufacturerAmerican Society for Testing and Materials Dba Astm International
StatusCANCELLED
Coverage Width24.000 INCHES NOMINAL IN
MaterialMINERAL FIBER LOCATION NOT OTHERWISE SPECIFIED
Departure From Cited DesignatorAS MODIFIED BY TEMP RATING
Nondefinitive Spec/std Data1 CLASS
Water Repellent Coated SurfaceNOT PROVIDED
Coverage Length48.000 INCHES NOMINAL IN
Maximum Thermal Conductivity0.25 AT 50 DEG. F MEAN TEMP.
One Side Decoration ProvisionNOT PROVIDED
Density Rating10.0 POUNDS PER CUBIC FOOT LBS
Short Edge Joint StyleBUTT JOINT
Flameproof FeatureINCLUDED
Overall Thickness2.000 INCHES NOMINAL IN
Long Edge Joint StyleBUTT JOINT
Temp Rating400.0 FAHRENHEIT DEGF
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
5640-00-142-5956ASTM C547 TYICLA INTERCHANGEABLE
Insulation Sleeving,thermal
General Services Administration Federal Supply Service
5640-00-242-6032 INTERCHANGEABLE
Insulation Felt,thermal
5640-00-242-6034 INTERCHANGEABLE
Insulation Felt,thermal
5640-00-267-6768 INTERCHANGEABLE
Insulation Block,thermal
5640-00-281-6918 INTERCHANGEABLE
Insulation Board,thermal
5640-00-398-3986 INTERCHANGEABLE
Insulation Blanket,thermal
5640-00-816-2094 INTERCHANGEABLE
Insulation Sleeving,thermal
5640-00-906-70915004554 INTERCHANGEABLE
Insulation Blanket,thermal
Knauf Insulation Gmbh
5640-01-021-7458 INTERCHANGEABLE
Insulation Board,thermal
5640-01-121-070274090 INTERCHANGEABLE
Insulation Blanket,thermal
Hdt Expeditionary Systems Inc
Cross-Reference Index
Part NumberManufacturer
ASTM C612 American Society for Testing and Materials Dba Astm International (USA)
HH-I-558 Federal Specifications Promulgated by General Services Administration Washington DC (USA)
HH-I-558 FMACL1 General Services Administration Federal Supply Service (USA)
Related Parts
5640-00-142-5956INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
ASTM C547 TYICLA
5640-00-242-6032INTERCHANGEABLE
INSULATION FELT,THERMAL
5640-00-242-6034INTERCHANGEABLE
INSULATION FELT,THERMAL
5640-00-267-6768INTERCHANGEABLE
INSULATION BLOCK,THERMAL
5640-00-281-6918INTERCHANGEABLE
INSULATION BOARD,THERMAL
5640-00-398-3986INTERCHANGEABLE
INSULATION BLANKET,THERMAL
5640-00-816-2094INTERCHANGEABLE
INSULATION SLEEVING,THERMAL
5640-00-906-7091INTERCHANGEABLE
INSULATION BLANKET,THERMAL
5004554
5640-01-021-7458INTERCHANGEABLE
INSULATION BOARD,THERMAL
5640-01-121-0702INTERCHANGEABLE
INSULATION BLANKET,THERMAL
74090
5640-01-237-6608INTERCHANGEABLE
INSULATION BOARD,THERMAL
8337040-1
5640-01-237-9839INTERCHANGEABLE
INSULATION BLOCK,THERMAL
8337040-2

Frequently Asked Questions

What is NSN 5640-00-079-3360?

NSN 5640-00-079-3360 is a Insulation Board,thermal, manufactured by American Society for Testing and Materials Dba Astm International, classified under FSC 5640 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5640-00-079-3360?

NSN 5640-00-079-3360 has 3 cross-referenced part numbers: ASTM C612 (American Society for Testing and Materials Dba Astm International), HH-I-558 (Federal Specifications Promulgated by General Services Administration Washington DC), HH-I-558 FMACL1 (General Services Administration Federal Supply Service).

What NSN replaces 5640-00-079-3360?

There are 12 known substitutes for 5640-00-079-3360: 5640-00-142-5956, 5640-00-242-6032, 5640-00-242-6034 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of ASTM C612?

Key specifications for ASTM C612: Overall Length: 48.000 INCHES NOMINAL IN; Coverage Width: 24.000 INCHES NOMINAL IN; Material: MINERAL FIBER LOCATION NOT OTHERWISE SPECIFIED; Departure From Cited Designator: AS MODIFIED BY TEMP RATING. 17 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5640-00-079-3360 still in active supply?

NSN 5640-00-079-3360 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.
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