The Nut,tube Coupling, cataloged under National Stock Number 4730-01-301-2918, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-301-2918 |
| Item Name | Nut,tube Coupling |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Criticality Code Justification | ZZZY |
| Material | STEEL CORROSION RESISTING OVERALL |
| Reference Number Differentiating Characteristics | SPECIAL CLEAN FOR LOX SERVICE IN ACCORDANCE WITH 1552AS201 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| SS-403-1BQ | 3/1 Design control — primary reference Swagelok Co |
| 1551AS305-3 | 7/1 Vendor item drawing reference Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| 1551AS305 | D/9 Drawing number reference only Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| SS-402-1BQ | C/1 Advisory reference — outside the item-of-supply concept Swagelok Co |
NSN 4730-01-301-2918 is a Nut,tube Coupling, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-301-3057, 4730-01-301-3058, 5310-01-310-7640. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-301-2918: Criticality Code Justification: ZZZY; Material: STEEL CORROSION RESISTING OVERALL; Reference Number Differentiating Characteristics: SPECIAL CLEAN FOR LOX SERVICE IN ACCORDANCE WITH 1552AS201. 3 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.