The Adapter,straight,flange to Pipe, cataloged under National Stock Number 4730-01-155-0221, is classified within Federal Supply Class 4730 (Hose, Pipe, Tube, Lubrication, and Railing Fittings) of the Pipe, Tubing, Hose, and Fittings group. Government technical data includes 20 specifications, cited from the U.S. Government catalog. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government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 | 4730-01-155-0221 |
| Item Name | Adapter,straight,flange to Pipe |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Status | ACTIVE |
| Flange Shape | RECTANGULAR WITH HOLES SECOND END |
| Nominal Pipe Size Accommodated | 1.000 INCHES FIRST END IN |
| Flange Face Design | RAISED STRAIGHT SECOND END |
| Connection Style | PLAIN (PIPE) FIRST END |
| Nominal Length | 2.750 INCHES SECOND END IN |
| Nominal Overall Length | 6.000 INCHES IN |
| Connection Type | FLANGE SECOND END |
| Connection Type | UNTHREADED EXTERNAL PIPE FIRST END |
| Material Document and Classification | QQ-S-763,CL 304,COND A FED SPEC SINGLE MATERIAL RESPONSE OVERALL |
| Bolt Hole Nominal Diameter | 0.469 INCHES SECOND END IN |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Center to Center Nominal Distance Between Bolt Holes Along Width | 1.875 INCHES SECOND END IN |
| Bolt Hole Quantity | 4 SECOND END |
| Nominal Width | 2.750 INCHES SECOND END IN |
| Center to Center Nominal Distance Between Bolt Holes Along Length | 1.875 INCHES SECOND END IN |
| Media for Which Designed | WATER SINGLE RESPONSE |
| Material | STEEL CORROSION RESISTING OVERALL |
| Raised Face Nominal Diameter | 1.436 INCHES SECOND END IN |
| Raised Face Nominal Height | 0.126 INCHES SECOND END IN |
| Nominal Thickness | 0.840 INCHES SECOND END IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 12-97-2010 | 3/2 Design control — primary reference U.S. Government activity |
| 516-4682494 | D/9 Drawing number reference only U.S. Government activity |
| 516-4682494F69 | 5/2 Secondary reference U.S. Government activity |
| 2621-228-02 | D/9 Drawing number reference only U.S. Government activity |
| 2621-228-02 ASSY 85 MOD | 5/2 Secondary reference U.S. Government activity |
NSN 4730-01-155-0221 is a Adapter,straight,flange to Pipe, classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
4 possible matches (shared part number, not a government interchangeability claim): 4730-01-155-2384, 4730-01-155-7782, 4730-01-160-5854. Verify interchangeability with system specifications before substitution.
Key specifications for 4730-01-155-0221: Flange Shape: RECTANGULAR WITH HOLES SECOND END; Nominal Pipe Size Accommodated: 1.000 INCHES FIRST END IN; Flange Face Design: RAISED STRAIGHT SECOND END; Connection Style: PLAIN (PIPE) FIRST END. 20 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.