The Union,pipe to Hose, cataloged under National Stock Number 4730-01-515-3774, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 11 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-515-3774 |
| Primary Part Number | 801-6640819 ASSY62 |
| Item Name | Union,pipe to Hose |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Material Document and Classification | MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE TAILPIECE |
| Material Document and Classification | QQ-N-281,CL A OR B FED SPEC SINGLE MATERIAL RESPONSE NUT |
| Seat Type | RECESSED |
| Nominal Thread Size | 1.000 INCHES SECOND END IN |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Maximum Operating Temp | 165.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | NICKEL ALLOY NUT |
| Material | COPPER ALLOY 715 TAILPIECE |
| Thread Series Designator | NPS FIRST END |
| Thread Series Designator | NPSH SECOND END |
| Reducer Type | CONCENTRIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 801-6640819 ASSY62 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 801-6640819 | D/9 Drawing number reference only Naval Sea Systems Command |
| 2633-002-01 ASSY-62 | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-515-3774 is a Union,pipe to Hose, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-515-3774 has 1 manufacturer part number on file: 801-6640819 ASSY62 (Naval Sea Systems Command).
2 possible matches (shared part number, not a government interchangeability claim): 4730-01-516-0275, 4730-01-517-2897. Verify interchangeability with system specifications before substitution.
Key specifications for 801-6640819 ASSY62: Material Document and Classification: MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE TAILPIECE; Material Document and Classification: QQ-N-281,CL A OR B FED SPEC SINGLE MATERIAL RESPONSE NUT; Seat Type: RECESSED; Nominal Thread Size: 1.000 INCHES SECOND END IN. 11 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.