The Insulation Sleeving,thermal, cataloged under National Stock Number 5640-00-237-4792, 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 9 specifications, cited from the U.S. Government catalog. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5640-00-237-4792 |
| Item Name | Insulation Sleeving,thermal |
| FSC / FSG | 5640 / 56 — Wallboard, Building Paper, and Thermal Insulation Materials |
| Status | ACTIVE |
| Length | 72.000 INCHES NOMINAL IN |
| Design Form | FULL ROUND |
| Insulation Thickness | 0.500 INCHES NOMINAL IN |
| Layer Quantity | 1 |
| Supplementary Features | EXPANDED UNICELLULAR PLASTIC FOAM |
| Flexibility | FLEXIBLE |
| Inside Diameter | 0.625 INCHES NOMINAL IN |
| Fabrication Method | EXPANDED |
| Flammability Rating | NOT RATED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| APT05812 | 5/9 Secondary reference Armacell Llc |
| MIL-P-15280 FMT | 5/1 Secondary reference U.S. Government activity |
| APT05812 | 5/9 Secondary reference Armstrong World Industries Inc |
| 000-8005-252 | 5/9 Secondary reference U.S. Government activity |
| 6 5/8-1/2 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| MIL-P-15280 | 4/1 Identification reference U.S. Government activity |
NSN 5640-00-237-4792 is a Insulation Sleeving,thermal, classified under FSC 5640, Wallboard, Building Paper, and Thermal Insulation Materials. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 5306-00-584-5340, 4820-00-995-8908, 1550-01-656-7665. Verify interchangeability with system specifications before substitution.
Key specifications for 5640-00-237-4792: Length: 72.000 INCHES NOMINAL IN; Design Form: FULL ROUND; Insulation Thickness: 0.500 INCHES NOMINAL IN; Layer Quantity: 1. 9 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.
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.