The Adapter,straight,pipe to Tube, cataloged under National Stock Number 4730-01-706-5256, 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 10 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-706-5256 |
| Primary Part Number | 803-5184176 1-1/4PC2 |
| Item Name | Adapter,straight,pipe to Tube |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Style | EXTERNAL SECOND END |
| Nominal Overall Length | 2.063 INCHES IN |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Material Document and Classification | ASTM B61 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) SINGLE MATERIAL RESPONSE THREAD PIECE |
| Nominal Thread Size | 1.500 INCHES SECOND END IN |
| Thread Class | 2A SECOND END A |
| Thread Quantity Per Inch | 18 SECOND END |
| Material | COPPER ALLOY THREAD PIECE |
| Thread Series Designator | UNEF SECOND END |
| 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 |
|---|---|
| 803-5184176 1-1/4PC2 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 5184176 | D/9 Drawing number reference only Naval Sea Systems Command |
| 803-5184176 PIECE 2 | C/1 Advisory reference — outside the item-of-supply concept Naval Sea Systems Command |
NSN 4730-01-706-5256 is a Adapter,straight,pipe to Tube, manufactured by Naval Sea Systems Command, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-706-5256 has 1 manufacturer part number on file: 803-5184176 1-1/4PC2 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-706-6353. Verify interchangeability with system specifications before substitution.
Key specifications for 803-5184176 1-1/4PC2: Connection Style: PLAIN (PIPE) FIRST END; Connection Style: EXTERNAL SECOND END; Nominal Overall Length: 2.063 INCHES IN; Connection Type: THREADED EXTERNAL PIPE SECOND END. 10 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.