PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

4-673645-1Insulation Blanket,thermal

Thermal Structures, Inc · NSN 5640-00-097-8879 · FSC 5640 · No Item Name Available
Verified by PartsTable
NSN 5640-00-097-8879 — this item is cataloged by the U.S. Government under National Stock Number 5640-00-097-8879. Primary manufacturer part number: 4-673645-1.
Features
  • Insulation Blanket,thermal — FSC 5640
  • 3 verified cross-references
  • Primary manufacturer: Thermal Structures, Inc
Applications
  • Building construction and repair
  • Infrastructure development
  • Road and bridge materials
General Description

The Insulation Blanket,thermal, cataloged under National Stock Number 5640-00-097-8879, is classified within Federal Supply Class 5640 (No Item Name Available) of the Construction and Building Materials group. The primary manufacturer of record is Thermal Structures, Inc. This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameInsulation Blanket,thermal
FSC / FSG5640 — No Item Name Available (FSG 56)
ManufacturersAstech Engineered Products Inc Div Astech Engineered Products (CAGE 92526); Thermal Structures, Inc (CAGE 54787); Rtx Corporation Div Pratt & Whitney (CAGE 55820)
Technical Specifications
ParameterValue
NSN5640-00-097-8879
Primary Part Number4-673645-1
Item NameInsulation Blanket,thermal
FSC / FSG5640 / 56 — No Item Name Available
ManufacturerThermal Structures, Inc
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
3110-00-227-3993HD547T INTERCHANGEABLE
Ring,bearing,outer
Textron Systems Corporation Dba Textron Systems Corp
3120-00-474-320431276 INTERCHANGEABLE
Bearing,sleeve
Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney
3455-00-516-504219839 INTERCHANGEABLE
Reamer,machine
Brown & Sharpe, Inc. Div Precision Measuring Instruments, Tesa Usa
6610-00-932-246131276 INTERCHANGEABLE
Housing,indicator
Aerosonic Llc
5310-01-150-104431276 INTERCHANGEABLE
Nut,stamped
Barnes Group Inc. Dba Barnes Distribution
2920-01-211-458231-276 INTERCHANGEABLE
Cover,dust,distributor
Prestolite Electric Inc
3230-01-221-141930511 INTERCHANGEABLE
Bit,router
Black and Decker Us Inc
3040-01-436-090031276 INTERCHANGEABLE
Brake,multiple Disk
Ausco Products Inc
6515-01-446-9711312.76 INTERCHANGEABLE
Chuck,drill
Depuy Synthes Sales Inc Dba Depuy Synthes Trauma Div Depuy Synthes Sales, Inc., D/b/a Depuy Synthes Trauma
Cross-Reference Index
Part NumberManufacturer
4-673645-1 Astech Engineered Products Inc Div Astech Engineered Products (USA)
4-673645-1 PRIMARY Thermal Structures, Inc (USA)
31276 Rtx Corporation Div Pratt & Whitney (USA)
Related Parts
3110-00-227-3993INTERCHANGEABLE
RING,BEARING,OUTER
HD547T
3120-00-474-3204INTERCHANGEABLE
BEARING,SLEEVE
31276
3455-00-516-5042INTERCHANGEABLE
REAMER,MACHINE
19839
6610-00-932-2461INTERCHANGEABLE
HOUSING,INDICATOR
31276
5310-01-150-1044INTERCHANGEABLE
NUT,STAMPED
31276
2920-01-211-4582INTERCHANGEABLE
COVER,DUST,DISTRIBUTOR
31-276
3230-01-221-1419INTERCHANGEABLE
BIT,ROUTER
30511
3040-01-436-0900INTERCHANGEABLE
BRAKE,MULTIPLE DISK
31276
6515-01-446-9711INTERCHANGEABLE
CHUCK,DRILL
312.76

Frequently Asked Questions

What is NSN 5640-00-097-8879?

NSN 5640-00-097-8879 is a Insulation Blanket,thermal, manufactured by Thermal Structures, Inc, classified under FSC 5640 (No Item Name Available). Status: active.

What are the part numbers for NSN 5640-00-097-8879?

NSN 5640-00-097-8879 has 3 cross-referenced part numbers: 4-673645-1 (Astech Engineered Products Inc Div Astech Engineered Products), 4-673645-1 (Thermal Structures, Inc), 31276 (Rtx Corporation Div Pratt & Whitney).

What NSN replaces 5640-00-097-8879?

There are 9 known substitutes for 5640-00-097-8879: 3110-00-227-3993, 3120-00-474-3204, 3455-00-516-5042 and 6 more. Verify interchangeability with system specifications before substitution.

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