The Elbow,pipe to Boss, cataloged under National Stock Number 4730-01-161-1291, 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 Triumph Manufacturing Company, Inc.. Government technical data includes 19 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4730-01-161-1291 |
| Primary Part Number | 2621-021-01ASSY89 |
| Item Name | Elbow,pipe to Boss |
| FSC / FSG | 4730 / 47 — Hose, Pipe, Tube, Lubrication, and Railing Fittings |
| Manufacturer | Triumph Manufacturing Company, Inc. |
| Status | ACTIVE |
| Furnished Items and Quantity | 1 LOCK WASHER AND 2 PREFORMED PACKING |
| Nominal Pipe Size Accommodated | 1.500 INCHES FIRST END IN |
| Connection Style | PLAIN (PIPE) FIRST END |
| Connection Style | DOUBLE THREADED SECTION W/ GASKET AND LOCKNUT SEALING (BOSS) SECOND END |
| Connection Type | THREADED EXTERNAL BOSS SECOND END |
| Connection Type | UNTHREADED EXTERNAL PIPE FIRST END |
| Material Document and Classification | QQ-S-763,COND A FED SPEC SINGLE MATERIAL RESPONSE TAILPIECE |
| Material Document and Classification | QQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE AND QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-S-783 FED SPEC SINGLE MATERIAL RESPONSE LOCK NUT |
| Operating Pressure | 700.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Leg Length | 2.150 INCHES NOMINAL SECOND END IN |
| Leg Length | 4.750 INCHES MINIMUM AND 10.000 INCHES MAXIMUM FIRST END IN |
| Nominal Thread Size | 1.625 INCHES SECOND END IN |
| Thread Class | 2A SECOND END A |
| Thread Quantity Per Inch | 12 SECOND END |
| Material | NICKEL ALLOY BODY |
| Material | STEEL COMP 316 LOCK NUT |
| Material | STEEL COMP 304 TAILPIECE |
| Thread Series Designator | UN 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 |
|---|---|
| 2621-021-01ASSY89 | Triumph Manufacturing Company, Inc. (USA) |
| Reference | Meaning |
|---|---|
| 2621-021-01 ASSY 89 | 3/2 Design control — primary reference U.S. Government activity |
| 2621-021-01 | D/9 Drawing number reference only U.S. Government activity |
NSN 4730-01-161-1291 is a Elbow,pipe to Boss, manufactured by Triumph Manufacturing Company, Inc., classified under FSC 4730, Hose, Pipe, Tube, Lubrication, and Railing Fittings. Status: active.
NSN 4730-01-161-1291 has 1 manufacturer part number on file: 2621-021-01ASSY89 (Triumph Manufacturing Company, Inc.).
Key specifications for 2621-021-01ASSY89: Furnished Items and Quantity: 1 LOCK WASHER AND 2 PREFORMED PACKING; Nominal Pipe Size Accommodated: 1.500 INCHES FIRST END IN; Connection Style: PLAIN (PIPE) FIRST END; Connection Style: DOUBLE THREADED SECTION W/ GASKET AND LOCKNUT SEALING (BOSS) SECOND END. 19 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.