PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

K1241Insulation Blanket,thermal

Johns Manville Intl · NSN 5640-01-674-2923 · FSC 5640 · No Item Name Available
Verified by PartsTable
NSN 5640-01-674-2923 — this item is cataloged by the U.S. Government under National Stock Number 5640-01-674-2923. Primary manufacturer part number: K1241.
Features
  • Insulation Blanket,thermal — FSC 5640
  • Width: 15.00 INCHES NOMINAL IN
  • Total Recovered Materials Percentage: 30.0
  • Thickness: 3.50 INCHES NOMINAL IN
  • Environmental Attribute Code: COMPREHENSIVE PROCUREMENT GUIDELINE - CONSTRUCTION PRODUCTS - BUILDING INSULATION PRODUCTS
  • Length: 93.00 INCHES NOMINAL IN
  • 2 verified cross-references
  • Primary manufacturer: Johns Manville Intl
Applications
  • Building construction and repair
  • Infrastructure development
  • Road and bridge materials
General Description

The Insulation Blanket,thermal, cataloged under National Stock Number 5640-01-674-2923, is classified within Federal Supply Class 5640 (No Item Name Available) of the Construction and Building Materials group. The primary manufacturer of record is Johns Manville Intl. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 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
NSN5640-01-674-2923
Primary Part NumberK1241
Item NameInsulation Blanket,thermal
FSC / FSG5640 / 56 — No Item Name Available
ManufacturerJohns Manville Intl
StatusACTIVE
Width15.00 INCHES NOMINAL IN
Total Recovered Materials Percentage30.0
Thickness3.50 INCHES NOMINAL IN
Environmental Attribute CodeCOMPREHENSIVE PROCUREMENT GUIDELINE - CONSTRUCTION PRODUCTS - BUILDING INSULATION PRODUCTS
Length93.00 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
7530-00-160-84777530-00-160-8477 INTERCHANGEABLE
Index Sheet Set,loose-Leaf Binde
Easter Seals Western & Central Pennsylvania
5133-00-232-6398 INTERCHANGEABLE
Drill,twist
4810-00-279-282771295SN2KVJ1N0L111P3 INTERCHANGEABLE
Valve,solenoid
Parker-Hannifin Corporation Dba Pneutronics Div Fluid Control Division
2940-00-377-555035298 INTERCHANGEABLE
Filter Element,fluid
Arvinmeritor Inc
5330-00-394-80101300-2 INTERCHANGEABLE
Gasket
Siemens Energy, Inc.
5935-00-644-674110368061 INTERCHANGEABLE
Connector,receptacle,electrical
Us Army Aviation and Missile Command
6645-00-766-365963B42313 INTERCHANGEABLE
Timer,sequential
Warner Robins Air Logistics Center
4730-00-787-1540372454 INTERCHANGEABLE
Elbow,hose Air Duct
Honeywell International Inc. Dba Honeywell International Div Aerospace - Phoenix
6930-00-966-18991300-2 INTERCHANGEABLE
Seperator,automatic
Parker-Hannifin Corporation Dba Pneutronics Div Pneumatic Division
6625-01-178-4020 INTERCHANGEABLE
Indicator,synchronization
Cross-Reference Index
Part NumberManufacturer
K1241 PRIMARY Johns Manville Intl (USA)
13002 Lowes of Huntsville (USA)
Related Parts
7530-00-160-8477INTERCHANGEABLE
INDEX SHEET SET,LOOSE-LEAF BINDE
7530-00-160-8477
5133-00-232-6398INTERCHANGEABLE
DRILL,TWIST
4810-00-279-2827INTERCHANGEABLE
VALVE,SOLENOID
71295SN2KVJ1N0L111P3
2940-00-377-5550INTERCHANGEABLE
FILTER ELEMENT,FLUID
35298
5330-00-394-8010INTERCHANGEABLE
GASKET
1300-2
5935-00-644-6741INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
10368061
6645-00-766-3659INTERCHANGEABLE
TIMER,SEQUENTIAL
63B42313
4730-00-787-1540INTERCHANGEABLE
ELBOW,HOSE AIR DUCT
372454
6930-00-966-1899INTERCHANGEABLE
SEPERATOR,AUTOMATIC
1300-2
6625-01-178-4020INTERCHANGEABLE
INDICATOR,SYNCHRONIZATION
5999-01-192-7570INTERCHANGEABLE
MAGNET,PERMANENT
6515-01-206-5066INTERCHANGEABLE
SURGICAL PACK,DISPOSABLE
13002

Frequently Asked Questions

What is NSN 5640-01-674-2923?

NSN 5640-01-674-2923 is a Insulation Blanket,thermal, manufactured by Johns Manville Intl, classified under FSC 5640 (No Item Name Available). Status: active.

What are the part numbers for NSN 5640-01-674-2923?

NSN 5640-01-674-2923 has 2 cross-referenced part numbers: K1241 (Johns Manville Intl), 13002 (Lowes of Huntsville).

What NSN replaces 5640-01-674-2923?

There are 12 known substitutes for 5640-01-674-2923: 7530-00-160-8477, 5133-00-232-6398, 4810-00-279-2827 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of K1241?

Key specifications for K1241: Width: 15.00 INCHES NOMINAL IN; Total Recovered Materials Percentage: 30.0; Thickness: 3.50 INCHES NOMINAL IN; Special Features: KRAFT FACED; FIBERGLASS; R13; 106.56 SQ FT. 6 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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