The Tailpiece,union, cataloged under National Stock Number 4730-01-520-9940, 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 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4730-01-520-9940 |
| Primary Part Number | 6394618 FIND 002 |
| Item Name | Tailpiece,union |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Flange Thickness | 0.120 INCHES NOMINAL IN |
| End Connection Type | BRAZED |
| Seat Type | STRAIGHT FACE |
| Tubing Outside Diameter | 0.500 INCHES NOMINAL IN |
| Material | COPPER ALLOY 706 |
| Flange Outside Diameter | 0.750 INCHES NOMINAL IN |
| 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 |
|---|---|
| 6394618 FIND 002 | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H849R-8-CUNI | 3/2 Design control — primary reference U.S. Government activity |
| 6394618 FIND 002 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-520-9940 is a Tailpiece,union, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-520-9940 has 1 manufacturer part number on file: 6394618 FIND 002 (Naval Sea Systems Command).
Key specifications for 6394618 FIND 002: Flange Thickness: 0.120 INCHES NOMINAL IN; End Connection Type: BRAZED; Overall Length: 0.500 INCHES NOMINAL IN; Seat Type: STRAIGHT FACE. 6 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.