The Union,pipe, cataloged under National Stock Number 4730-01-421-3460, 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 Flagg Stanley G & Co Inc Dba Flagg Brass. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-421-3460 |
| Primary Part Number | 6915-300 |
| Item Name | Union,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Flagg Stanley G & Co Inc Dba Flagg Brass |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 1.500 INCHES ALL ENDS IN |
| Connection Style | SOCKET (PIPE) ALL ENDS |
| Connection Type | UNTHREADED INTERNAL PIPE ALL ENDS |
| Material Document and Classification | MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | COPPER ALLOY 715 OVERALL |
| 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 |
|---|---|
| 6915-300 | Flagg Stanley G & Co Inc Dba Flagg Brass (USA) |
| 018347-FI/BV | Bec Systems Llc Dba Bec Machine Products (USA) |
| 55J4 | Fonderie St-Romuald Inc (CAN) |
| Reference | Meaning |
|---|---|
| 77301300 70/30 CUNI | 5/9 Secondary reference W & O Supply Inc |
| 47950-24 | 5/9 Secondary reference Nucraloy Corp |
| 77301300 1 1/2 INCH SW | 5/9 Secondary reference W & O Supply Inc |
| 77301300 | 3/9 Design control — primary reference W & O Supply Inc |
| 77301300 1 1/2 | C/1 Advisory reference — outside the item-of-supply concept W & O Supply Inc |
NSN 4730-01-421-3460 is a Union,pipe, manufactured by Flagg Stanley G & Co Inc Dba Flagg Brass, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-421-3460 has 3 manufacturer part numbers on file: 6915-300 (Flagg Stanley G & Co Inc Dba Flagg Brass), 018347-FI/BV (Bec Systems Llc Dba Bec Machine Products), 55J4 (Fonderie St-Romuald Inc).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-603-2044. Verify interchangeability with system specifications before substitution.
Key specifications for 6915-300: Nominal Pipe Size Accommodated: 1.500 INCHES ALL ENDS IN; Connection Style: SOCKET (PIPE) ALL ENDS; Connection Type: UNTHREADED INTERNAL PIPE ALL ENDS; Material Document and Classification: MIL-C-15726 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL. 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.