The Hose Assembly,heated: Hstl, cataloged under National Stock Number 4720-01-545-2939, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4720-01-545-2939 |
| Item Name | Hose Assembly,heated: Hstl |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| General Characteristics Item Description | THE HEATED SAMPLE TRANSFER LINE (HSTL) IS LOCATED ON THE RIGHT SIDE OF THE CHEMICAL VAPOR SAMPLER UNIT (CVSU) AND FUNCTIONS AS THE HOSE THROUGH WHICH SAMPLED AIR TRAVELS FROM THE OUTSIDE OF THE VEHICLE TO THE PNEUMATIC UNIT OF NSN 6665-01-545-2048 THE CHEMICAL VAPOR SAMPLER UNIT (CVSU). THE HSTL IS 42 INCHES LONG AND MADE OF RUBBER WITH A CHEMICALLY INSERT LINING TO FORM A DOUBLE WALL. HEAT IS APPLIED TO THE INTERIOR OF THE LINE BY WAY OF THE ELECTRICAL CABLE TO REDUCE CONDENSATION. THE HEAT FROM THE HSTL KEEPS THE SAMPLE IN A VAPOROUS STATE TO OPTIMIZE THE INTEGRITY OF THE SAMPLE IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 5-15-31516 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4720-01-545-2939 is a Hose Assembly,heated: Hstl, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
Key specifications for 4720-01-545-2939: General Characteristics Item Description: THE HEATED SAMPLE TRANSFER LINE (HSTL) IS LOCATED ON THE RIGHT SIDE OF THE CHEMICAL VAPOR SAMPLER UNIT (CVSU) AND FUNCTIONS AS THE HOSE THROUGH WHICH SAMPLED AIR TRAVELS FROM THE OUTSIDE OF THE VEHICLE TO THE PNEUMATIC UNIT OF NSN 6665-01-545-2048 THE CHEMICAL VAPOR SAMPLER UNIT (CVSU). THE HSTL IS 42 INCHES LONG AND MADE OF RUBBER WITH A CHEMICALLY INSERT LINING TO FORM A DOUBLE WALL. HEAT IS APPLIED TO THE INTERIOR OF THE LINE BY WAY OF THE ELECTRICAL CABLE TO REDUCE CONDENSATION. THE HEAT FROM THE HSTL KEEPS THE SAMPLE IN A VAPOROUS STATE TO OPTIMIZE THE INTEGRITY OF THE SAMPLE IN; Special Features: PCCN: BAC278 X PLISN: ABDZ. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.