The Insulation Block,thermal, cataloged under National Stock Number 5640-01-495-0803, is classified within Federal Supply Class 5640 (Wallboard, Building Paper, and Thermal Insulation Materials) of the Construction and Building Materials group. Government technical data includes 2 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5640-01-495-0803 |
| Item Name | Insulation Block,thermal |
| FSC / FSG | 5640 / 56 — Wallboard, Building Paper, and Thermal Insulation Materials |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 199238-K1 | 3/1 Design control — primary reference L3harris Maritime Power & Energy Solutions, Inc. Dba Spd Electrical Systems, Inc. |
NSN 5640-01-495-0803 is a Insulation Block,thermal, classified under FSC 5640, Wallboard, Building Paper, and Thermal Insulation Materials. Status: active.
Key specifications for 5640-01-495-0803: Criticality Code Justification: ZZZY; Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS. 2 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 5640-01-495-0803 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.