The Bushing,pipe, cataloged under National Stock Number 4730-01-300-3175, 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 Air Systems Command Managed Original Design Activity Not Material/parts Supplier. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-300-3175 |
| Primary Part Number | 1551AS717-273 |
| Item Name | Bushing,pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Internal Screw Thread Series Designator | NPT |
| Internal Thread Direction | RIGHT-HAND |
| Style Designator | OUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL) |
| External Screw Thread Series Designator | NPT |
| External Thread Size | 2-1/2-8 |
| Surface Treatment | CADMIUM AND CHROMATE |
| Internal Thread Size | 2-11-1/2 |
| Material | IRON MALLEABLE |
| Working Pressure and Service Type | 300.0 POUNDS PER SQUARE INCH (PSI) NOMINAL GAS AND 300.0 POUNDS PER SQUARE INCH (PSI) NOMINAL OIL AND 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL STEAM AND 300.0 POUNDS PER SQUARE INCH (PSI) NOMINAL WATER LBS |
| External Thread Direction | RIGHT-HAND |
| 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 |
|---|---|
| 1551AS717-273 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 1551AS717-273 2-1/2X2 | 5/1 Secondary reference Flagg Stanley G & Co Inc Dba Flagg Brass |
| 1551AS717 | D/9 Drawing number reference only Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
NSN 4730-01-300-3175 is a Bushing,pipe, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-300-3175 has 1 manufacturer part number on file: 1551AS717-273 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier).
3 possible matches (shared part number, not a government interchangeability claim): 4730-01-300-4125, 4730-01-300-4126, 4730-01-372-6681. Verify interchangeability with system specifications before substitution.
Key specifications for 1551AS717-273: Internal Screw Thread Series Designator: NPT; Internal Thread Direction: RIGHT-HAND; Style Designator: OUTSIDE HEXAGON OR OCTAGON (PARTIAL OR FULL THREAD OPTIONAL); External Screw Thread Series Designator: NPT. 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.