The Tubing,nonmetallic, cataloged under National Stock Number 4720-01-657-1789, is classified within Federal Supply Class 4720 (Hose and Flexible Tubing) of the Pipe, Tubing, Hose, and Fittings group. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4720-01-657-1789 |
| Item Name | Tubing,nonmetallic |
| FSC / FSG | 4720 / 47 — Hose and Flexible Tubing |
| Status | ACTIVE |
| 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 |
|---|---|
| 78647-001-A | 3/2 Design control — primary reference U.S. Government activity |
| ASTMB338,GR2,0.25ODX0.035THK | 3/1 Design control — primary reference U.S. Government activity |
| W3T105710ITEM27 | 5/2 Secondary reference U.S. Government activity |
| W2T269534 | 5/2 Secondary reference U.S. Government activity |
NSN 4720-01-657-1789 is a Tubing,nonmetallic, classified under FSC 4720, Hose and Flexible Tubing. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4720-01-685-4580. Verify interchangeability with system specifications before substitution.
Key specifications for 4720-01-657-1789: Part Name Assigned by Controlling Agency: TUBING,NONMETALLIC. 0 specifications are 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.